TEMPE, Ariz. — Zach Plesac is trying to get back his old self, with a new repertoire. Plesac spent part of his winter remaking himself at Driveline, the high-tech baseball training center. Plesac, 29, said he’s replaced his four-seam fastball with a two-seamer, and he’s changed his slider into more of a sweeper, which he hopes will help induce more swings and misses. If it works, the Angels could get a steal for the $1 million, one-year deal they gave Plesac last month.