The Mariners have claimed Ryan Weber off waivers from the Brewers, the two clubs announced. Milwaukee designated Weber for assignment earlier this week after acquiring Kyle Lobstein from the Nationals. To create 40-man roster space, Seattle designated infielder Wyatt Mathisen for assignment.
Weber’s stay in Milwaukee proved quite brief. The Brew Crew added him off waivers from the Red Sox last month, and he ultimately made just a single appearance with the team. He also pitched in one major league game with Boston, but the majority of his experience this season has come at the minors’ highest level.
Between the Red Sox’s and Brewers’ top affiliates, Weber has made nine appearances (eight starts) in Triple-A this year, working to a 5.02 ERA with an average 23.5% strikeout percentage and a strong 6.0% walk rate. The right-hander has been quite good at that level over the course of his career. In parts of six Triple-A seasons, he’s pitched to a stingy 3.08 ERA, striking out hitters at a below-average rate (17.1%) but rarely doling out free passes (5.2% walk percentage) and inducing plenty of groundballs.
To date, he hasn’t carried that success over to the major league level. While Weber’s racked up grounders at a lofty 52.8% clip over his 61 MLB appearances, he’s only managed a 5.27 ERA/4.30 SIERA thanks to a lack of missed bats. Still, the 30-year-old is capable of working as a starter or multi-inning reliever, and he can be optioned for the remainder of the season. So long as he sticks on the 40-man roster, Weber will give the Mariners front office a flexible depth option for the pitching staff.
Seattle acquired Mathisen from the Rays for cash considerations last month. He’s spent his entire Mariners tenure at Triple-A Tacoma, where he’s slumped to a .122/.302/.184 line across 63 plate appearances. That belies a generally strong track record at that level. Mathisen has hit a much better .258/.362/.491 over parts of three Triple-A seasons, but he hasn’t performed well in a brief big league look comprising 84 plate appearances between 2020-21.
The Mariners will have a week to trade Mathisen or expose him to waivers. He’s already been in DFA limbo twice this season — first with the Diamondbacks and then with Tampa Bay — and been acquired by a rival club each time. It wouldn’t be surprising if another team picks him up via small trade or waiver claim, although his most recent struggles with the Rainiers could dissuade clubs from devoting him a 40-man roster spot.