Originally a second round pick of the Devil Rays in 2001, Switzer was 2-4 with a 6.11 ERA in 66.1 IP for the Rays between 2003 and 2007. In the majors in those years, Switzer had an unimpressive K/BB ratio of 43/36.
The Mets also promoted LHP Eric Niesen from Advanced-A St. Lucie to AA Binghamton Friday. Niesen was 3-4 with a 3.28 ERA in 11 starts in the FSL. In 57.2 IP, he'd fanned 49, walked 16 and given up 52 hits. The timing of the move is a little odd in that he's coming off two of his worst outings of the year having given up nine runs in his last 7.2 innings of work. The way I read this is that Brad Holt, who rolled his ankle, and, I've been told is not running yet, will miss more than one turn through the B-Mets rotation.
Update: RHP Jacob Ruckle has been added to St. Lucie from XST.