The Red Sox have been active this offseason, and on Tuesday they added another intriguing arm to the mix, signing right-hander Kyle Keller to a free agent deal.
Keller’s name might not jump off the page for casual fans, but his journey is one worth watching. After parts of three seasons in Major League bullpens, he took his talents overseas and spent the last four years pitching in Japan’s Nippon Professional Baseball league. Over there, he didn’t just hold his own-he thrived, posting a 2.42 ERA and proving he could be a reliable presence on the mound.
Now 32, Keller is looking to turn that success into a second act in the majors. Originally drafted in the 18th round by the Marlins back in 2015 out of Southeastern Louisiana University, he made his MLB debut in 2019 with Miami. He showed some promise in limited action, putting up a 3.38 ERA across 10 appearances.
From there, it was a winding road. He landed with the Angels in 2020, but only saw two outings that season. In 2021, he got a longer look with the Pirates, appearing in 32 games, though the results weren’t quite what he or the club had hoped for-he finished with a 6.48 ERA.
In total, Keller has logged 46.1 innings in the big leagues, striking out 48 batters. The raw stuff has always been there-he’s a 6-foot-4 righty with a fastball that can miss bats. But like a lot of pitchers on the fringe, consistency was the missing piece.
That’s where his time in Japan comes into play. Keller used his stint overseas to refine his game, and more importantly, to rebuild his confidence.
He didn’t just go to Japan to stay in the game-he went to get better. And now, after proving himself in one of the toughest leagues outside the U.S., he’s earned another shot.
Making the Red Sox roster won’t be easy. Boston’s bullpen picture is still taking shape, and spring training will bring plenty of competition. But Keller’s experience, both in the majors and abroad, gives him a compelling case.
If he can carry over even a portion of his NPB success, Keller could become one of those under-the-radar signings that ends up paying dividends. And if nothing else, this is a pitcher who bet on himself-and made it back. That’s the kind of story baseball always has room for.