MESA—Randy Wells pitched two perfect innings, Derrek Lee homered and Marlon Byrd also homered in his first game with the Cubs, leading to a 9-3 victory over the Oakland A’s on Thursday.Wells, coming off a surprising rookie season in which he went 12-10 and had the NL’s 10th-best ERA (3.05), struck out two and didn’t let the ball out of the infield.Byrd, who signed a three-year contract to play center field for the Cubs after getting 20 homers and 89 RBIs for Texas last season, also singled. Tyler Colvin, who has an outside shot at being a backup outfielder, homered and doubled twice as part of a 16-hit attack. Brad Snyder and Sam Fuld also homered.Trevor Cahill, who is trying to earn the No. 5 spot in Oakland’s rotation, allowed two runs and three hits in two innings.