Perez has made 10 appearances for the Tomateros de Culiacan in the Mexican League.
After five games in relief which saw him yield five runs in as many innings, the left-hander was moved into a starting role.
He tossed 10 scoreless innings while fanning eight and walking six over his first two starts, but he then gave up three walks on four hits and three walks over 1.1 frames against Mochis. Following five days rest, Perez allowed six earned runs on six hits with two walks and three strikeouts over 5.2 innings to Guasave in a game he started well before melting down in the middle innings.
The big nail in this coffin came in the form of back-to-back two-out homers in the fourth inning. The loss was the southpaw’s second in a row.
On Friday, Perez continued to struggle with his command in his fifth start of the winter.
He walked six and yielded two runs on three hits while striking out five over six innings, as the Tomateros defeated the Naranjeros de Hermosillo, 13-2.
While he still wasn’t particularly sharp, the one big improvement to note was that almost two-thirds of his outs were recorded on ground balls. Perez isn’t really known as a guy who gets batters to swing over a lot of pitches, so I can only assume that he did a better job at keeping the ball low in the zone against a good hitting team that is at the top of the Mexican League.
The pitcher, who has allowed 24 baserunners and 11 runs over 13 innings in his last three outings, has a 5.14 ERA for the winter over 10 total appearances.
Perez went 1-1 with a 3.47 ERA in four starts between St. Lucie and Buffalo in 2010, and 0-5 with a 6.80 ERA in 17 Major League appearances, including seven starts.
He is expected to fight for a bullpen job in spring training in March. GM Sandy Alderson reportedly said Perez will not make the 25-man roster unless he thoroughly earns his spot.