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08/07/08 8:38 PM ET

Collision lands Murphy on 15-day DL

Rangers to mix, match their outfield with players like Boggs

ARLINGTON -- David Murphy has been officially placed on the 15-day disabled list and Jason Ellison had his contract purchased from Triple-A Oklahoma on Thursday to replace Murphy on the roster, while Milton Bradley remains day-to-day and Brandon Boggs will be called upon to be the club's everyday left fielder.

Just another day at Rangers Ballpark in Arlington.

As expected, the knee injury that Murphy suffered in a collision at home plate on Wednesday night will cost him two to four weeks on the DL. The only difference between Wednesday's prognosis and Thursday's MRI results was that Murphy suffered a right knee sprain rather than a strained posterior cruciate ligament.

"It's not like it matters," Murphy said. "It's all the same. It won't make any difference in how long I'm out. It feels OK, but not to the point I can go out and sprint on it. Everything seems as positive as can be."

Murphy said he hoped to be back closer to the two-week mark, rather than the four, but he added that the doctor told him the first seven to 10 days would be the most telling as to how quickly his knee will heal.

As anxious as Murphy is to return to action, he said he must be patient with the knee, because there's a chance the injury could worsen if he tests it too early.

"I'm sure there would be if I went around running on it right now," Murphy said. "I know when I'll be able to start working on it. I'll be able to tell by how it feels."

So while Murphy is out, Texas will use Boggs as its everyday left fielder and insert Ellison in situations where it needs his defense in the outfield or his speed on the bases.

Ellison has primarily been a center fielder in his career, but he is also capable of playing left and right field. With parts of five seasons' worth of Major League experience, Ellison knows what's expected of him.

"I've wanted to be here for a long time," Ellison said. "The circumstances obviously aren't good with David Murphy hurt, but I'm willing to do whatever I have to do while I'm here.

"I've dealt with this kind of situation before, so it's nothing new for me."

Manager Ron Washington isn't trying to put any pressure on Ellison.

"I don't expect anything but for him to be the pro that he is," Washington said. "He can provide us some defensive stability, and he can give us some speed on the bases."

While Washington will have to wait to see how Boggs handles everyday outfield duties, he isn't counting on Bradley joining the outfield mix anytime soon.

Washington said Bradley would hopefully be able to start at designated hitter at some point during the Baltimore series, which begins on Friday, but he ruled out the possibility of Bradley playing the outfield during the series.

As for Boggs, he likes the feeling of knowing his name will be in the lineup every day while Murphy is out, and he's just going to try to enjoy it while he can.

"It makes me focus a little harder, but I'm not going to change the way I go about my daily preparations," Boggs said. "I'm going to keep doing what I have been."

Shawn Shroyer is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.