Scott Alexander vs. Drey Jamison The San Francisco Giants take on the Arizona Diamondbacks again today at Oracle Park. The Giants will use Scott Alexander as an opener for Jakob Junis, who will enter today’s game with a 4.28 ERA, 3.69 FIP, with 94 strikeouts to 23 walks in 107.1 innings pitched. His last appearance was in Sunday’s 3-2 Giants win over the Diamondbacks, in which he allowed one run on four hits with seven strikeouts and a walk in five and a third innings. He’ll be facing off against Diamondbacks right-handed rookie Drey Jameson, who enters today’s game with…