The Pirates signed Rainey to a minor-league contract Dec. 6 that includes an invitation to spring training.
Rainey was non-tendered by the Nationals in November after posting a 4.76 ERA and 44:29 K:BB over 51 frames in 2024 in his first year back from Tommy John surgery. The reliever's stuff hasn't looked the same post-op, but he's a fine gamble on a non-roster deal in hopes that he can rediscover it.