MLB Player News

Simpson (elbow) has started throwing, Christina De Nicola of MLB.com reports.

Simpson has been shut down since April, when he underwent surgery to repair the ulnar nerve in his left elbow. However, he's begun throwing at Single-A Jupiter. He's on track to return in late July or early August.

The Marlins outrighted Go to Triple-A Jacksonville on Tuesday.

Go was designated for assignment last week and after clearing waivers, he'll stick around in the Marlins organization at Jacksonville. The 25-year-old owns a 3.00 ERA in nine innings with Jacksonville and has yet to make his MLB debut.

The Cardinals recalled Roycroft from Triple-A Memphis on Tuesday.

The right-hander was optioned to Memphis in late May but is now back with the big-league club. Roycroft has given up four earned runs in six innings for the Cardinals this season but has a 0.98 ERA over 14 outings at Triple-A.

The Pirates selected Heller's contract from Triple-A Indianapolis on Tuesday, Alex Stumpf of MLB.com reports.

Heller had posted a 4.91 ERA but also a 34:8 K:BB over 18.1 innings with Indianapolis. The 32-year-old has extensive major-league experience, having collected a 3.06 ERA over 50 career appearances covering parts of five seasons.

The Pirates optioned Hernandez to Triple-A Indianapolis on Tuesday, Alex Stumpf of MLB.com reports.

Hernandez hadn't pitched in nearly two weeks after being recalled back on May 23 and making an appearance that day. He's being replaced on the roster and in the bullpen by Ben Heller.

The Cardinals optioned Loutos to Triple-A Memphis on Tuesday.

St. Louis is swapping out right-handed relievers, replacing Loutos with Chris Roycroft. Loutos contributed 1.1 scoreless innings over two appearances during his brief time in the majors.

Atlanta transferred Matzek (elbow) from the 15-day injured list to the 60-day IL on Tuesday, Grant McAuley of 92.9 The Game Atlanta

The transaction frees up a spot on the 40-man roster for infielder Brian Anderson, who signed a one-year deal with the club. Matzek has been sidelined for nearly a month with left elbow inflammation and now won't be eligible to return for at least another month.

Walston is scheduled to start Tuesday's game against the Giants at Chase Field.

After he was called up from Triple-A Reno on May 26, Walston made his first big-league start later that day against the Marlins, striking out four over 4.2 scoreless innings in a no-decision. Arizona had previously confirmed Walston for a start against the Mets this past weekend, but he was ultimately pushed back in the pitching schedule after the Diamondbacks elected to call up Slade Cecconi from Reno to slot into the rotation following Zac Gallen's (hamstring) placement on the 15-day injured list. Until one of Gallen, Merrill Kelly (shoulder) or Eduardo Rodriguez (shoulder) returns from the IL, the Diamondbacks should have back-end rotation spots available for both Walston and Cecconi.

The Diamondbacks transferred Frias' (shoulder) rehab assignment to Triple-A Reno on Tuesday.

Frias has been on Arizona's injured list since April 19 with right shoulder inflammation but finally looks to be inching toward a return to the active roster. He began his rehab assignment in the rookie-level Arizona Complex League over the weekend, tossing a scoreless inning in his lone outing. He'll likely make a handful of relief appearances for Reno before rejoining the big-league bullpen.

Major League Baseball announced Tuesday that Saalfrank has received a one-year suspension for violating the league's gambling policy, Jared Diamond of the Wall Street Journal reports.

MLB's investigation revealed that Saalfrank made a total of 29 baseball bets -- including 28 on MLB games -- while he was on a minor-league contract with the Diamondbacks. He didn't appear in any of the games on which he bet and MLB has determined the outcomes of the contests weren't compromised in any way. Saalfrank has made two appearances out of the Arizona bullpen this season but was optioned to Triple-A Reno on May 1.