Exactly one month ago, Brandon Moss became the everyday first baseman for the A's, whose Feb. 4 trade that sent Chris Carter to the Astros left him as the undisputed No. 1 guy. Still, Moss claims he's no more at ease despite shedding his platoon status. "I wouldn't call it a comfort factor. I went into spring training one other time thinking the job was mine," Moss said Sunday. "Never assume anything's yours." He was referring to 2009 with the Pirates. It's the most he played in a big-league season, but his 385 at-bats were far fewer than he had anticipated. He was part of a "four- or five-man rotation in right field," he said, sharing time with Garrett Jones, Delwyn Young and Eric Hinske, among others. Now the A's envision Moss, following his breakout 2012, as the man at first, facing both right-handed and left-handed pitchers. A lefty swinger, Moss actually hit for a higher average against lefties last year, following his career path. But his power numbers are far better against righties - .643 slugging percentage vs. .431 off lefties - which is why the A's value him so highly. They're perfectly fine with him as a dead pull hitter with an all-or-nothing mentality and admitting he's not in this business to hit singles, especially against righties. Read more: http://www.sfgate.com/athletics/shea/article/Moss-not-feeling-complacent-at-first-base-4325047.php#ixzz2MawIynn0