Anderson (0-1) took the loss against the Athletics on Thursday, allowing four runs on seven hits and two walks while striking out three batters over five innings.
Anderson fell behind quickly, giving up a solo homer to the second batter he faced in the game. Though Seattle responded with a three-run bottom of the first inning, the rookie hurler couldn't capitalize, and he trailed by a run when his day was done after five frames. Both the seven hits and four runs Anderson allowed were his most through three big-league starts, and he's found the sledding a bit rough at the MLB level thus far, posting a 5.40 ERA, 1.47 WHIP and 11:7 K:BB over 15 innings. He'll look to get into the win column for the first time when he next takes the mound, which is slated to be a home matchup against the Rangers.
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Mariners' Kade Anderson: Works into fifth frame in Toronto
Rotowire
Anderson allowed two runs on three hits and three walks while striking out three across 4.1 innings in a no-decision against the Blue Jays on Saturday.
Anderson kept the Blue Jays off the board through the first four innings of Saturday's start. He was brought back out for the fifth but was pulled after allowing two men on base, both of whom came home to score later in the frame. Anderson tossed 85 pitches (54 strikes) while generating eight whiffs against Toronto, and he'll likely stay around that 80-pitch limit over the final stretch of the regular season. Across his first two major-league outings, the 22-year-old southpaw has allowed five runs on eight hits and five walks while striking out eight over 10 frames. Anderson is lined up to take on the Athletics at home next week.
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Mariners' Kade Anderson: Facing pitch limit around 80
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Anderson will be operating on a pitch limit of around 80 again Saturday against the Blue Jays, Ryan Divish of The Seattle Times reports.
The 22-year-old left-hander threw 81 pitches in his major-league debut last weekend, completing 5.2 innings in a no-decision at home against the Cubs. Anderson and the M's are on the road in Toronto for his second big-league outing Saturday, and it doesn't sound like the team will completely take the reins off the top prospect just yet as he acclimates to the highest level of professional baseball. It's possible that some restrictions will remain in place over the rest of the campaign.
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Mariners' Kade Anderson: Just misses quality start in MLB debut
Rotowire
Anderson took a no-decision against the Cubs on Saturday, allowing three runs on five hits and two walks in 5.2 innings. He struck out five.
Making his highly anticipated major-league debut, the 22-year-old southpaw fired four shutout innings to begin Saturday's outing before faltering a bit. The Cubs tagged Anderson for a pair of solo home runs in the sixth inning to spoil what had been an outstanding opening act up until that point, but the rookie hurler still showed plenty of promise overall. Anderson, widely regarded as the top pitching prospect in baseball, is tentatively slated to make his second big-league appearance next weekend in Toronto.
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Mariners' Kade Anderson: Promoted ahead of start
Rotowire
The Mariners selected Anderson's contract from Double-A Arkansas ahead of his start Saturday against the Cubs.
After turning in a 1.06 ERA and 0.64 WHIP while striking out 135 batters in 93.1 innings at Double-A, Anderson will skip past Triple-A and make his MLB debut Saturday. The 22-year-old lefty is viewed by many as the top pitching prospect in the sport and is likely to remain in the Mariners' rotation through the end of the season, assuming he doesn't struggle mightily during his first few major-league outings. Jhonathan Diaz was designated for assignment in a corresponding move.
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Mariners' Kade Anderson: Making debut Saturday
Rotowire
The Mariners are expected to select Anderson's contract from Double-A Arkansas to start Saturday's game against the Cubs, Jeff Passan of ESPN.com reports.
Widely viewed as one of the top pitching prospects in all of baseball, Anderson has been incredible at Double-A this season, pitching to a ludicrous 1.06 ERA and 0.64 WHIP to go with a 135:13 K:BB across 93.1 innings. The 22-year-old's dominance will allow him to skip Triple-A entirely and head straight to the big leagues, further bolstering a Mariners rotation that's put up a 3.89 ERA this year. His first test in the big leagues will come against a Cubs offense that's logged a .772 OPS since the beginning of the month, but the young lefty is still worth rostering in virtually all fantasy formats.
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Mariners' Kade Anderson: Scoreless streak to start career
Rotowire
Anderson hasn't allowed a run while striking out 17 batters in nine innings over his first two starts at Double-A Arkansas.
Anderson has allowed five hits and three walks, good for a 0.89 WHIP to go with his sterling 0.00 ERA. The top college prospect from last year's draft, Anderson was given an aggressive assignment to Double-A and has been up for the challenge. He could be big-league ready in weeks, rather than months, so if the Mariners need reinforcements from Triple-A this summer, Anderson could get the call.
Anderson is opening the season with Double-A Arkansas, Daniel Kramer of MLB.com reports.
Most of the top college arms get assigned to High-A for their first full season, so while this assignment may not be a big surprise, it is notable. Per the report, the initial plan was to assign Anderson to High-A Everett, but the calculus changed after Anderson made such a strong impression this spring. The less volatile weather conditions in Arkansas compared to the Pacific Northwest in April also factored into the decision. What makes the assignment even more notable is that the Mariners have a track record of jumping their best pitching prospects from Double-A to the majors, bypassing the Pacific Coast League. Ryan Sloan, the Mariners other premium pitching prospect, is also opening the year at Double-A.
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Mariners' Kade Anderson: Impressing early in spring
Rotowire
Anderson has impressed early in spring training and is expected to advance quickly through the Mariners system, Ryan Divish of The Seattle Times reports.
Anderson has yet to make his professional debut since being selected with the No. 3 overall pick in the 2025 First-Year Player Draft, but the left-hander is already receiving rave reviews following his performance Sunday during a live batting practice session against some Mariners regulars. Anderson is likely to begin the upcoming season with High-A Everett, though he's not expected to "spend a heck of a lot of time in the high minors," according to Jerry Dipoto, the Mariners' president of baseball operations. Seattle's rotation is one of the league's best, and while Anderson still has a lot to prove, he could have an outside chance at making his MLB debut at some point in 2026.
