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8/7/2014 7:04 P.M. ET

Fowler to start Triple-A rehab stint Friday

PHILADELPHIA -- Astros outfielder Dexter Fowler joined Triple-A Oklahoma City on Thursday and took batting practice in preparation for beginning a Minor League rehab assignment Friday for the RedHawks. He's been on the disabled list since June 27 with a strained intercostal muscle.

Fowler was to serve as the designated hitter Friday and will likely play at least two games in the outfield before the Astros would consider activating him, which could come as early as Monday against the Twins in Houston.

"Hopefully we're able to get him back here real soon," manager Bo Porter said.

Fowler, acquired in an offseason trade with the Rockies, is hitting .270 with six homers, 24 RBIs and a .377 on-base percentage in 76 games.

Meanwhile, fellow outfielder Alex Presley played catch on the field and took batting practice in the indoor cage Thursday without any issues. He's been on the disabled list since July 8 with a right oblique strain and hopes to work out on the field in Houston this weekend.

Like Fowler, he'll need a few days on a rehab assignment.

"Hopefully whenever I can go and feel that I can do everything full tilt, then I would imagine that would be the time to go play," Presley said. "But I'm getting close to that point. I can't imagine it would be too much longer."

Astros to evaluate Springer for possible activation

PHILADELPHIA -- One day after rookie outfielder George Springer was forced to leave his rehab outing at Class A Quad Cities after tweaking an injury to his left quad, Astros manager Bo Porter on Thursday categorized the issue as minor.

Springer flew to Houston on Thursday as previously planned and will be examined by the training staff Friday at Minute Maid Park. The Astros had hoped to activate Springer on Friday against the Rangers, but that's up in the air.

"He was going to have a day off regardless," Porter said before Thursday's series finale vs. the Phillies. "Obviously, with him having to come out of the game yesterday, we'll send him through a workout [Friday] and see how he recovers, and if he doesn't have any setbacks, we'll make a decision at that point whether to activate him or give him more time."

Springer played in three games at Quad Cities, serving as the designated hitter Monday and Wednesday. He was supposed to play seven innings in the outfield Wednesday, but a wet field limited him to DH again. He doubled in the first inning and walked in the fourth before being lifted for a pinch-hitter in the fifth inning.

"After missing the number of days in which he's missed, there's no way to emulate game intensity or game speed," Porter said. "You can come out here and do all these drills and it be controlled, but you get into the game and there's no way to control the atmosphere. The hope is that it was just not him playing for 2 1/2 weeks or so and the adrenaline of playing in the game made him a little sore."

Springer was hitting .231 with 20 homers and 51 RBIs in 78 games since being called up in the middle of April. He was the American League Rookie of the Month in May. He's been on the disabled list since July 20 with a strained left quad.

Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.