The Rangers have agreed to a minor league contract with free agent righty Mason Thompson, per the team’s transaction log at MLB.com. It’s a homecoming for the Round Rock native, who’ll presumably be in big league camp with the club later this month.
A third-round pick by the Padres in 2016, Thompson has pitched in parts of four big league seasons between the Friars and the Nationals. The 6’6″, 240-pound righty has been tagged for a 5.21 ERA in 114 innings, with a gruesome 11.81 ERA (16 runs in 10 2/3 innings) this past season skewing that mark a bit. Though Thompson’s 2025 performance was rocky to say the least — he also posted an ERA over 6.00 in 16 minor league frames — it bears mentioning that this was his first time back on the mound following Tommy John surgery in spring of 2024.
Prior to his injury, Thompson pitched 103 1/3 major league frames with a more palatable 4.53 ERA. His 17.7% strikeout rate and 10% walk rate were both notably worse than league average, but his 51.1% ground-ball mark was excellent. The velocity on Thompson’s sinker was down a big in his return, but he still averaged a hearty 95 mph on the pitch, complementing it with a lesser-used four-seamer at the same velocity, a mid-80s slider and a very occasional upper-80s changeup.
Because they cobbled together their 2025 bullpen primarily via a series of low-cost, one-year contracts, the Rangers entered the 2025-26 offseason in need of nearly an entirely new relief corps. They’ve followed a similar path to the one they took last winter, adding veterans Chris Martin (who re-signed), Jakob Junis, Alexis Diaz and Tyler Alexander on one-year contracts and claiming righty Michel Otañez off waivers. Assuming he is indeed invited to camp, Thompson will be the most experienced bullpen arm among Texas’ collection of non-roster invitees.
Last year it was Robert Garcia and Patrick Corbin. This year it’s MacKenzie Gore and Mason Thompson.
There’s a name out of the blue.
The question is, can the new pitching regime turn these arms into gold like Mike Maddux was able to do?
In recent years, watching Texas rebuild much of the relief staff so well and with a very limited budget has been super impressive. Maybe this year we’ll get a hint of how much of this good fortune should be attributed to Chris Young over Mike Maddux. Sure sad to see even half of this duo leave.