Jenrry Mejia's demotion is Bobby Parnell's gain.
Parnell is due to join the Mets for Tuesday's series opener against the Detroit Tigers, the Mets have confirmed.
The 25-year-old right-hander pitched a scoreless relief inning Sunday for Triple-A Buffalo. He is 1-1 with a 4.14 ERA and four saves in 41 1/3 innings spanning 24 appearances with the Bisons.
Parnell set a franchise rookie record last season by making 68 appearances with the Mets last season. He was 4-8 with a 5.30 ERA, although his ERA was skewed by a handful of bad starts among the eight he made in 2009.