ARLINGTON -- The A's Conor Jackson was out of the lineup on Sunday with sore ribs after a collision at first base in the ninth inning on Saturday with Rangers shortstop Elvis Andrus.

Jackson hadn't hit in the batting cages when he talked to the media before the game, so he was unsure whether he would be available as a pinch-hitter. But he does expect to be back in the starting lineup after the four-day All-Star break.

"There are a million things that could have happened there," Jackson said. "I got out of it pretty fortunate. I took a good shot to the ribs. I've never had a rib issue. It's not broken. Just took a Mike Tyson jab."

Jackson was reaching for the ball up the left-field line and had to come off the bag for a lofted throw from second baseman Jemile Weeks. Andrus crashed into Jackson and fell on top of him. Both players were able to remain in the game.

Melvin designs rotation to rest Cahill, Harden

ARLINGTON -- A's manager Bob Melvin announced his post-All-Star break rotation before Sunday's game in Texas, naming Brandon McCarthy as Friday's starter against the Angels in the second-half opener.

The move was designed to give ace Trevor Cahill an extra day of rest after starting Sunday against the Rangers, and to give Rich Harden some extra time before his next start. Cahill and Harden will start Saturday's doubleheader against the Angels, and Gio Gonzalez, the A's lone All-Star representative, will start Sunday.

Melvin said he was still unsure of the A's fifth starter coming out of the break. The A's have two off-days on June 18 and 21, so they could go with four starters until a fifth one is needed.

Melvin did say he wants to make sure Cahill gets two starts with an extra day's, rest and he also wants to be careful with Harden, thus the decision to bring McCarthy back first after the break.

"It will be hot today [in Texas]," Melvin said. "You want to make sure when [Cahill] comes back he's able to play catch the next day and therefore I gave him an extra day and then with the off-day that's two starts with an extra day."

Harden hasn't thrown 100 pitches yet through the first half, and with his injury history, Melvin also wants to play it safe.

"I want to make sure he's fully rested when he goes out there to pitch," Melvin said.

Worth noting

• Right-hander Tyson Ross (strained left oblique) has one more rehab start scheduled, and how that goes will determine if he returns as the A's fifth starter.

"You want a guy to have some success and I know he wants to as well," manager Bob Melvin said.

• Outfielder/DH Hideki Matsui was given Sunday's game off after a long stretch of playing in 26 of the A's past 28 games. Matsui played eight games in left field because of Josh Willingham's injury, and Melvin said that might have taken its toll. Matsui is hitless in 14 at-bats and 5-for-41 over his past 12 games. Matsui now gets Sunday off plus the four-day All-Star break.

"He'll never admit it or say it, but I feel like I extended him too much by playing him in the outfield a lot," Melvin said. "And it's not like he's not prepared for that, but at that point, he wasn't really conditioned for it. He'll be back hitting third the first game after the break."

• The A's likely will go into the break with the fewest home runs in the American League. The A's had 50 homers entering Sunday. Minnesota had 54 and Seattle had 55.