(Photo credit: Allan Henry-Imagn Images)The Los Angeles Dodgers and Arizona Diamondbacks begin a three-game series on Tuesday facing varying degrees of postseason certainty. 'A lot has to go right for us,' Arizona right fielder Corbin Carroll said. Dodgers right-hander Shohei Ohtani (1-1, 3.29 ERA) will face Arizona right-hander Brandon Pfaadt (13-8, 5.02) in the series opener on Tuesday. He struck out five in five no-hit innings on Sept. 16 but did not get a decision in the Dodgers' 9-6 loss to the Phillies. 'To do something that is historic in some way, it means you are doing something right,' Carroll said.