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7/10/2013 3:11 A.M. ET

Rockies acquire Boggs from Cardinals

The Rockies acquired right-handed reliever Mitchell Boggs from St. Louis on Tuesday, and Boggs will be optioned to Double-A Tulsa. In exchange, the Cardinals received an international signing bonus slot.

"He's another arm that we have down there we can go to," Rockies manager Walt Weiss said. "We'll see how he does down there, but he's got a track record up here, a successful one. It's a nice asset to have. He just needs to pitch, show that he's healthy and go from there."

In a corresponding move to clear room on Colorado's 40-man roster, the Rockies designated right-hander Joe Gardner for assignment.

Sending Boggs to Tulsa rather than the extreme altitude of Triple-A Colorado Springs is a strategy the Rockies used with left-hander Colin McHugh, who arrived in a trade with the Mets. McHugh has moved to Colorado Springs.

"The Springs is a tough place to throw a guy into, so it's nice to go to Tulsa for a few outings before you get thrown into the fire there," Weiss said.

The 29-year-old Boggs struggled in 18 appearances this season, posting an ERA of 11.05. He was optioned to Triple-A Memphis in May, and went 0-2 with a 5.70 ERA in 18 appearances -- three of them starts.

Despite the poor numbers this season, Boggs was one of the Cardinals' most reliable options out of the 'pen in 2012, when he led the National League with 34 holds and notched a 2.21 ERA. In six seasons for St. Louis, Boggs was 13-15 with a 4.15 ERA.

Tulo flying west to possibly reunite with club

COLORADO SPRINGS -- After two injury rehab games at Triple-A Colorado Springs -- the second more statistically successful than the first -- All-Star shortstop Troy Tulowitzki is on the verge of rejoining the Rockies.

Tulowitzki, who suffered a broken rib on June 13, will fly to the West Coast on Wednesday and be evaluated Thursday in Los Angeles, with an eye toward activating him for Thursday night's game at Dodger Stadium. Dexter Fowler, who hasn't played since sustaining a hand injury on June 25, also could be activated.

Tulowitzki went 1-for-2 and fielded several grounders Monday night and said he was sore Tuesday morning. On Tuesday night, he went 3-for-3 and scored a run.

Rockies head athletic trainer Keith Dugger revealed Tuesday night that Tulowitzki, who wasn't sure how long he needed to play before returning, would be evaluated at the same time as Fowler.

"Just being out there on the field is nice, and then to come out of it healthy and feeling good is even a bonus," Tulowitzki said before Tuesday night's game. "There's some soreness -- I'm not going to lie and say it felt great. There's definitely some soreness, I could tell I hadn't been in games for a while. But it was a step in the right direction."

By returning this week, Tulowitzki should be able to play in the All-Star Game next Tuesday at Citi Field in New York. He and Rockies left fielder Carlos Gonzalez, who has missed the last two games with a sprained right middle finger, have been elected as starters.

Tulowitzki said his priorities go beyond the Midsummer Classic.

"The most important thing for the Rockies and myself is to at least have me for that second half to try to make a run at this thing," Tulowitzki said.

On Tuesday night, Tulowitzki's bat showed plenty of life as he sprayed each of his singles to a different field and picked up a walk before he left after the top of the sixth (within the five-seven innings for which he was scheduled).

In the second he knocked a ball off the left-field wall and looked to be jogging gingerly into second, where he was tagged out standing up.

Some saw Tulowitzki grabbing at his rib area during Monday night's game, but he said he was simply adjusting the protective rib pad he will likely wear for the remainder of the season.

Fowler hopeful to return to Rockies on Thursday

COLORADO SPRINGS, Colo. -- Center fielder Dexter Fowler emerged from the indoor batting cage at Colorado Springs on Tuesday and delivered good news for the Rockies.

"I'm playing Thursday," he said.

Fowler went 0-for-3 with a pair of walks and a stolen base in his second and final rehab start for the Sky Sox Tuesday, departing after playing eight innings. He struck out swinging and twice bit at the first pitch he saw, both resulting in routine outs.

Fowler is eligible to return from the 15-day disabled list from a right hand injury for Thursday's opener of the final series before the All-Star break at Dodger Stadium. If no problems arise on Tuesday night, when he is scheduled for nine innings in a rehab game at Triple-A Colorado Springs, he will fly Wednesday to the West coast. He went 0-for-3 Monday in his first rehab game.

"I felt fine out there," Fowler said. "On the swings I took, it felt good."

Fowler said he was sore Tuesday morning, but felt better as the day progressed. He plans to fly to join the Rockies on Wednesday.

CarGo sits out Tuesday with sprained finger

SAN DIEGO -- Rockies All-Star left fielder Carlos Gonzalez missed his second straight game Tuesday night with a sprained right middle finger and said he hoped to take batting practice Wednesday with an eye toward returning to the lineup Thursday at Los Angeles.

"It feels a little better, and I hope I'll get to play the first game in Los Angeles," said Gonzalez, who had the middle finger taped to his index finger Tuesday for stabilization.

With Dexter Fowler expected to return Thursday after spending time on the 15-day disabled list with a right hand injury, the Rockies hope to face the Dodgers with their potent outfield -- Gonzalez, Fowler and All-Star Michael Cuddyer -- intact.

"He's getting close - we thought it might be a few days here," Rockies manager Walt Weiss said. "He's shown improvement. That's a good sign."

Oswalt hopes to return to Rockies rotation soon

SAN DIEGO -- Rockies right-hander Roy Oswalt, who sustained a left hamstring strain on Sunday, said he hopes to return soon after the All-Star break.

Oswalt sustained in the injury covering the plate after a wild pitch in the second inning of Sunday's loss at Arizona and was placed on the 15-day disabled list on Monday. The team announced that Oswalt will return to Denver for an MRI. Oswalt hopes the extra time off for the All-Star break will make his absence minimal.

"It feels better than it did, but I don't feel great," said Oswalt, who received treatment, performed light exercise on the stationary bike and fitness machines Tuesday, and did some throwing in an effort to keep his arm in shape for when he is cleared to begin pitching. "The good thing is we do have the All-Star break, so that's four days I won't miss.

"I'm hoping to miss two starts at the most and be ready to go."

Oswalt signed with the Rockies in May with the hope of bringing experience and quality to the rotation. Oswalt returned with a lively fastball, but wasn't sharp with his off-speed stuff or consistent with his location. He said his pitch mix seemed on the mark Sunday, before he was injured. He is 0-4 with a 7.64 ERA in four starts.

AJ Cassavell is a reporter for MLB.com. Follow him on Twitter @ajcassavell. Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.