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The Red Sox optioned La Sorsa to Triple-A Worcester on Monday.
La Sorsa was just added to the Boston roster last week and made just one appearance, giving up a solo home run to one of the two batters he faced. The lefty reliever is being replaced on the active roster by utility player Nate Eaton, who was recalled from Worcester.
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Red Sox's Joe La Sorsa: Joining Red Sox
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The Pirates traded La Sorsa to the Red Sox on Thursday, Ari Alexander of 7 News Boston reports.
La Sorsa will be active Friday for the Red Sox while they are in New York playing the Yankees. The southpaw exercised his upward-mobility clause at the end of May, and he'll now get a look in the majors with Boston. The Pirates are receiving cash considerations in return, per Colin Beazley of the Pittsburgh Post-Gazette.
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Pirates' Joe La Sorsa: Exercising upward mobility clause
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La Sorsa is expected to trigger his upward mobility clause Monday, Ari Alexander of 7 News Boston reports.
La Sorsa signed a minor-league contract with the Pirates before the 2026 campaign and already attempted to find another suitor once by exercising his upward mobility clause, ultimately sticking around after he went unclaimed on waivers in late March. The southpaw has posted a 3.60 ERA and 1.12 WHIP with 21 strikeouts over 25 innings in 21 appearances, including two starts, with Triple-A Indianapolis this season. It's unclear if he'll garner much interest on the open market.
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Pirates' Joe La Sorsa: Reporting to Triple-A Indianapolis
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La Sorsa will remain in the Pittsburgh organization and will accept an assignment to Triple-A Indianapolis after going unclaimed off waivers Wednesday, Ari Alexander of 7 News Boston reports.
La Sorsa, who had attended Pirates camp on a minor-league deal, had an upward-mobility clause in his contract that allowed him to move on from the Pirates if another organization had claimed him off waivers and placed him on its Opening Day roster. However, after finding no suitors on the waiver wire, La Sorsa will stick around with the Pirates and likely serve as a high-leverage arm in the Indianapolis bullpen to begin the season.
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Joe La Sorsa: Moving on from Pittsburgh
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La Sorsa plans to exercise the upward mobility clause in his minor-league contract with the Pirates after being reassigned to minor-league camp Sunday, Ari Alexander of 7 News Boston reports.
Though the left-hander was unable to secure a spot in the Opening Day bullpen, he's believed to have other suitors interested in him. La Sorsa tossed three scoreless innings in Grapefruit League play for the Pirates and was also a lockdown reliever for Team Italy in the World Baseball Classic, striking out four of the 11 batters he faced in the tournament.
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Pirates' Joe La Sorsa: Invited to Pirates' camp
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La Sorsa signed a minor-league contract with the Pirates on Saturday that includes an invitation to big-league spring training, Jon Morosi of MLB Network reports.
La Sorsa gave up eight earned runs in just 6.2 innings with the Reds in 2025, but he finished the minor-league season with a 2.59 ERA and 1.27 WHIP across 48.2 innings at Triple-A. He'll get another chance to work his way back to the majors during spring training; otherwise, he'll help round out the bullpen at Triple-A Indianapolis.
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Joe La Sorsa: Elects free agency
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La Sorsa elected free agency Friday, Charlie Goldsmith of Fox 19 Now Cincinnati reports.
La Sorsa was designated for assignment by the Reds on Tuesday, and after clearing waivers, he's opted to test the open market rather than accept an outright assignment to Triple-A Louisville. He surrendered eight runs in 6.2 innings with the Reds this season, but he has a 2.82 ERA in 44.2 innings at Louisville.
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Reds' Joe La Sorsa: Outrighted to Triple-A
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The Reds outrighted La Sorsa to Triple-A Louisville on Friday.
He's no longer on the 40-man roster, but La Sorsa will remain in the organization after passing through waivers. The lefty reliever has permitted nine runs (eight earned) in 6.2 innings during his brief time in the majors this season.
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Reds' Joe La Sorsa: Booted from 40-man roster
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The Reds designated La Sorsa for assignment Tuesday.
The transaction frees up a spot on the 40-man roster for the addition of Reiver Sanmartin. La Sorsa has made five appearances out of the Reds' bullpen this season, allowing nine runs (eight earned) in 6.2 innings.
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Reds' Joe La Sorsa: Takes loss after yielding home run
Rotowire
La Sorsa (0-1) took the loss against the Brewers on Saturday after giving up a three-run home run in the 11th inning.
La Sorsa was brought up from Triple-A Louisville on Friday and tossed a scoreless inning during that contest. He was brought in for the 11th inning Saturday and tasked with keeping things tied at 3-3, but the game was blown wide open after his changeup to Andruw Monasterio was taken deep to left field. La Sorsa has yielded four home runs despite appearing in just six MLB games this season, which has inflated his ratios to a 10.80 ERA and 2.25 WHIP over 6.2 innings.
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Reds' Joe La Sorsa: Returns to Triple-A
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The Reds optioned La Sorsa to Triple-A Louisville on Sunday.
The left-hander will head to the minors after he took the loss Saturday against the Brewers after giving up three runs (two earned) in the 11th inning. Connor Phillips was called up from Louisville to take La Sorsa's spot in the bullpen.
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Reds' Joe La Sorsa: Called up by Reds
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The Reds recalled La Sorsa from Triple-A Louisville on Friday.
The 27-year-old reliever will join the 26-man roster Friday in place of Chase Burns (elbow), who's landed on the 15-day injured list. La Sorsa hasn't pitched for the Reds since June 30. He's surrendered six runs in 4.2 innings in the big leagues this season, but he's cruised to a 2.70 ERA in 40 innings at Louisville.
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Reds' Joe La Sorsa: Optioned to Triple-A
Rotowire
The Reds optioned La Sorsa to Triple-A Louisville on Tuesday.
La Sorsa's latest stint in the big leagues lasted just one day, and he allowed two runs over 2.2 innings in a relief appearance in Boston. The Reds are replacing him with a fresh bullpen arm.
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Reds' Joe La Sorsa: Rejoins big-league bullpen
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The Reds recalled La Sorsa from Triple-A Louisville on Monday.
He's absorbing the roster spot vacated by Ian Gibaut (shoulder), who has landed on the 15-day injured list. La Sorsa has made two appearances for the Reds this season, getting dinged for four runs.
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Reds' Joe La Sorsa: Heading back to minors
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The Reds optioned La Sorsa to Triple-A Louisville on Thursday.
La Sorsa was just recalled Tuesday and was knocked around for four runs over one inning in Wednesday's loss to the Guardians. The Reds have not announced a corresponding move, but it's likely that Brent Suter will return from the bereavement list prior to Friday's contest in Detroit.
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Reds' Joe La Sorsa: Recalled from Triple-A
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The Reds recalled La Sorsa from Triple-A Louisville on Tuesday.
La Sorsa has made one appearance with the Reds this season, tossing a scoreless frame. He will give manager Terry Francona another left-handed relief option while Brent Suter is on the bereavement list.
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Reds' Joe La Sorsa: Returned to minors
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The Reds optioned La Sorsa to Triple-A Louisville on Sunday.
La Sorsa was added as a 27th man Saturday, when the Reds and Diamondbacks completed a suspended game along with playing their regularly scheduled contest. The lefty reliever pitched one inning in the latter game, managing a scoreless frame despite two walks.
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Reds' Joe La Sorsa: Serving as 27th man
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The Reds appointed La Sorsa as the 27th man for Saturday's game against the Diamondbacks.
With Friday's suspended game resuming Saturday, the Reds will replenish their bullpen by adding La Sorsa as their extra player. He has spent the entire 2025 season with Triple-A Louisville, where he has a 3.92 ERA, 1.34 WHIP and 14:14 K:BB across 20.2 innings.
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Reds' Joe La Sorsa: Added to 40-man and optioned
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The Reds selected La Sorsa's contract on Tuesday and optioned him to Triple-A Louisville.
La Sorsa had an upward mobility clause in his minor-league contract, and the Reds have decided to keep him around rather than risk losing him to another organization. The left-handed reliever has posted a 3.92 ERA and 14:14 K:BB over 20.2 innings this season with Louisville.
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Reds' Joe La Sorsa: Reassigned despite velocity bump
Rotowire
The Reds reassigned La Sorsa to minor-league camp Friday, Charlie Goldsmith of Charlie's Chalkboard reports.
La Sorsa tossed six scoreless innings and has displayed a major bump up in velocity this spring, sitting in the mid-90s after he averaged 90.7 mph during the 2024 season. It wasn't enough to make the Opening Day roster, but the lefty gives the Reds some relief depth at Triple-A Louisville.
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