KANSAS CITY -- Matt Harrison, on the disabled list with biceps tendinitis, is scheduled to pitch two innings on medical rehabilitation assignment for Double-A Frisco Wednesday night. If all goes well, Harrison will join the Rangers in Minnesota and be activated either Friday or Saturday.

He will replace Guillermo Moscoso in the bullpen. The Rangers will use him as both a long/middle reliever, and as a possible left-handed situational reliever in the sixth and seventh innings.

"We think where he fits best right now," Rangers manager Ron Washington said. "He gives us a second lefty with length and a guy who we can use more than one inning."

The Rangers also hope Harrison can take some of the workload off Darren Oliver, who entered Wednesday with 22 appearances, tied for the sixth most in the American League.

Smoak, Borbon getting benefit of doubt

KANSAS CITY -- The Rangers right now are sending signals that they will continue to be patient with first baseman Justin Smoak and center fielder Julio Borbon as they try to get untracked offensively.

Smoak had an eighth-inning single on Tuesday night to snap an 0-for-13 slump, but entered Wednesday's game with the Royals hitting .168 with four home runs and 11 RBIs in 31 games.

Chris Davis was hitting .188 with one home run and five RBIs in 15 games when he was optioned to Triple-A Oklahoma in April. Davis is currently hitting .312 with two home runs and 22 RBIs at Oklahoma City but there are no plans at this point to make a change.

"It's an offensive position and obviously we haven't been particularly productive at that spot," Rangers general manager Jon Daniels said. "This is Justin's first go-around. I've been generally encouraged by the quality of his at-bats. We'll execute patience the same way we have other guys in the past. He's capable of producing in that spot."

Borbon was 0-for-3 with two strikeouts, on Tuesday, and is hitting .234 for the season in 40 games. He hit .312 in 46 games for the Rangers last year. However, he is hitting .285 in May after starting off .191 in April, and he is hitting .289 since being dropped to the No. 9 spot in the order.

"He has shown signs of what he's capable of," Daniels said. "He's certainly not as consistent as we've seen in the past. We want to give him an opportunity to make some adjustments and get out of it. This week he's going to see a string of right-handers. That's an opportunity to do just that."

Young ties club mark for triples

KANSAS CITY -- Rangers third baseman Michael Young tied a club record for most career triples in the sixth inning of Wednesday's game against the Royals.

Young drove home Elvis Andrus with a triple to right-center off of Royals starter Luke Hochevar. It was the 44th triple of his career, tying him with Ruben Sierra for the most ever in Rangers history.

Texas had also gone 24 games without a triple. This one extended Young's hitting streak to 12 games and he has reached base safely at least once in 22 consecutive games.

Guerrero vaults into the AL lead in RBIs

KANSAS CITY -- Vladimir Guerrero's five RBIs on Tuesday has shot him into the AL lead with 42 on the season. The 42 RBIs have come in 176 at-bats. He had 50 RBIs in 383 at-bats for the Angels last season.

Guerrero is also second in the league in hitting with a .347 batting average, fourth with 12 home runs and fourth with a .597 slugging percentage. He hit .295 with 15 home runs and a .460 slugging percentage last year while dealing with a knee injury.

"I really didn't have any expectations as far as numbers as much as health," Guerrero said. "I just wanted to get my knees ready to play every day. I'm more excited about that than the numbers."

Treanor won't be moving to leadoff spot

KANSAS CITY -- Catcher Matt Treanor had a nice offensive night on Tuesday. He had two walks, a sacrifice bunt, an infield hit and also stole a base without a throw. That's the kind of performance a team likes to get from the leadoff hitter.

But manager Ron Washington still had Treanor batting eighth on Wednesday afternoon.

"I need a couple more bunt hits and a couple more stolen bases before I walk into Wash's office," Treanor said.

The stolen base occurred in the sixth inning against Royals starter Gil Meche. Treanor took off on a 3-1 pitch. He actually was off even before Meche started his delivery but the pitcher never saw him.

"I was gone," Treanor said. "I heard [first baseman Billy] Butler say, 'Step off!' but he kept going. He wasn't paying any attention to me."

Treanor went himself. Washington gives his players the automatic green light to run if they feel they can make it. He'll only give runners a "stop sign" if he doesn't want them running in a particular situation. Washington didn't give it any thought either way.

"[Meche] had no thought of Matt Treanor going," Washington said. "I had no thought of Matt Treanor going. But Matt Treanor was smart enough to realize what was going on. He's got something you can't teach. He's got instincts."

Treanor's only other stolen base in the Major Leagues came on April 7, 2008, while with the Marlins against Washington pitcher Tim Redding and catcher Paul LoDuca. Treanor was on first with a runner on third when he stole second.

He did have 37 stolen bases in his Minor League career with a high of nine at Triple-A in 2003.

Worth noting

KANSAS CITY -- Reliever Frank Francisco is available to pitch on Wednesday. The Rangers were trying to stay away from him on Tuesday night, wanting to give him two days off after a heavy workload on the homestand. ... The White Sox are in line to pitch left-hander Mark Buehrle and right-handers Gavin Floyd and Freddy Garcia during their three-game series with the Rangers next week at U.S. Cellular Field. ... Michael Young's double on Tuesday night was his 321st of his career. That ties him with Rafael Palmeiro for the second most in club history. The leader is Ivan Rodriguez with 352.