Giants adding RHP Tyler Mahle on one-year deal (source)

The Giants enhanced their rotation depth by agreeing to a one-year deal with right-hander Tyler Mahle, a source told MLB.com’s Mark Feinsand on Wednesday.

The club has not confirmed the agreement.

The 2025 season continued a string of injury-plagued campaigns for Mahle, who has made just 24 starts over the past three years, a large chunk of which was spent recovering from Tommy John surgery. Right shoulder fatigue was the culprit in 2025, landing Mahle on the injured list for more than three months.

That said, the 31-year-old was highly effective around the IL stint, even with a strikeout rate (19.1%) below his pre-surgery figure (24.9%). Mahle finished the year with a 2.18 ERA over 86 2/3 innings for the Rangers, ranking fourth behind Nathan Eovaldi, Trevor Rogers and Paul Skenes among pitchers who made at least 15 starts.

Mahle did not receive a qualifying offer from the Rangers after last season, so there is no Draft pick compensation attached to him, or penalty for signing him.

For the most part, Mahle has been an above-average starter when he’s been able to take the mound. Since the beginning of 2020, he owns a 3.61 ERA (121 ERA+) with a 3.77 FIP over 473 1/3 innings.

The California native had his best full season with the Reds in 2021, recording career highs in innings (180) and strikeouts (210) with a 3.75 ERA (125 ERA+). That was also his last year without an IL stint.

Cincinnati dealt him to Minnesota prior to the Trade Deadline in 2022, but injuries ended up limiting him to nine starts in a Twins uniform before he reached free agency for the first time at the end of ’23.

Amid his rehab from Tommy John surgery, Mahle signed a two-year, $22 million deal with the Rangers in December 2023. He made his big league return late in 2024 before entering ’25 as part of Texas’ rotation.

Mahle is the second free-agent starter the Giants have signed this offseason, joining fellow right-hander Adrian Houser, who signed a two-year, $22 million deal on Dec. 19. Houser and Mahle are expected to join incumbents Logan Webb, Robbie Ray and Landen Roupp in San Francisco’s rotation in 2026.

The Giants also have several young starters who could give them an extra layer of depth, including Hayden Birdsong, Carson Whisenhunt, Trevor McDonald and Blade Tidwell.