Colon injured in Athletics' 2-1 loss to Padres

"It felt bad," the Oakland pitcher said Sunday following a 2-1 loss to the San Diego Padres. "I had the same thing on my other side in 1999 with Cleveland and missed 28 days."

Colon, who will have an MRI on Monday, lasted two-plus innings — the team's shortest start of the year. He could become the seventh Athletics pitcher to spend time on the disabled list this season.

"It's tough to be without him, but he'll be back as soon as he can," second baseman Jemile Weeks said. "He'll be ready to go when he does come back."

Weeks struck out against San Diego closer Huston Street with runners at the corners in the ninth, ending Oakland's season-best five-game winning streak. Jonny Gomes had three hits for the A's.

"To not come through, or at least put the ball in play, is frustrating," Weeks said. "It's frustrating to somehow swing through a hittable fastball. I don't do that very often."

Street got four outs for his eighth save in eight chances. Clayton Richard (4-7) scattered five singles over 7 2-3 innings to earn his second consecutive win.

"He threw a great game," Padres manager Bud Black said. "He mixed in enough sliders, change (and) curveballs to keep them honest. But it was all about the fastball in good spots, throwing strikes and working fast."

Everth Cabrera scored on a groundout in the second and the Padres tacked on an insurance run in the ninth to salvage the finale of their nine-game road trip.

Oakland had two runners on in the second, fourth and sixth but Richard worked out of trouble each time to win for the second time in eight road starts this season.