Tweaks to his mechanics helped Chris Stratton post wins in his last two starts at Triple-A Sacramento. Tonight, the Mississippi State product from Tupelo gets to see if the changes pass muster in the big leagues. Stratton was recalled by the San Francisco Giants to start against the lowly New York Mets at CitiField. In his previous three big league appearances, Stratton allowed 17 runs in 10 innings. That precipitated a second trip to the minors this summer for the right-hander, who was in the Giants’ rotation to start the season. Though he hasn’t won a game in the majors since June 17, he still leads the San Francisco staff in victories. He is 8-7 with a 5.52 ERA in 20 games. The Giants are a sub-.500 club whose postseason hopes are hanging by a thread. A sweep of the current four-game series against the Mets is a virtual necessity – and a real possibility. The Mets, in their first year under Ole Miss alum Mickey Callaway, have been snake-bit, and not just by injuries. They handed the Giants the winning run on Monday when two fielders collided and a pop fly dropped. Shades of ’62.