ARLINGTON, Texas -- Derek Holland hopes to begin a rehab assignment Monday, but the next step toward his return from the disabled list has yet to be determined.

Holland felt good while throwing 30 pitches during a bullpen session Wednesday and was going to throw another before Friday’s game.

“I actually tried to do more and (pitching coach Mike) Maddux took the ball,” Holland said. “I felt good. Everything was working fine. I threw everything – curveball, fastball, slider. I’m just waiting to see what the next step will be after this.”

Holland, who is 5-4 with a 5.10 ERA this season, was placed on the DL 15 days ago due to a stomach ailment and weakened shoulder. He had dropped from 215 pounds to 198, causing him to lose velocity on his fastball. Holland said Friday that he weighs 207.

Manager Ron Washington said a timetable for Holland’s return has yet to be established.

UPDATE: Holland threw 42 pitches in a bullpen session today. He is expected to throw again Sunday or Monday.

Other notes:

* Other Rangers pitchers on the disabled list are also making progress. Alexi Ogando is expected to long toss today. Koji Uehara is feeling better and may start throwing tomorrow. Neftali Feliz has made less progress as his rehab is moving slow.

* Mitch Moreland is out 4-6 weeks with a hamstring injury. Read more here.

* With Moreland out of the lineup, Ron Washington said he will be using Mike Napoli, Michael Young, and Brandon Snyder at first base. He said he will be using his DH slot to give his starters a break from defense and allow players like Leonys Martin and Craig Gentry to get more playing time.

* Temperatures this weekend are expected to be in the 100's and Washington said that the Rangers would be limiting their time outside. He said that they would probably alternate days hitting outside and closely monitor player health.

* Ballots are in the clubhouse and the Rangers players are casting their votes this week for the MLB All-Star game.

* Going into Friday's game, the Rangers are 12-3 in interleague play and are riding a six-game winning streak. The Rangers are tied with the New York Yankees for the best interleague record in the majors from 2010-12 at 35-16.

* Today is Ian Kinsler's 30th birthday.

* TCU head baseball coach Jim Schlossnagle was in the clubhouse today with his new assistant coach, Kirk Saarloos. The two visited and were with the team for batting practice.