Roy Oswalt expects he'll need only four starts in the minors before joining the Texas Rangers.

"For the last six weeks I've been throwing bullpens every other day. I wanted to make sure I had plenty of throwing in before I stepped out on the field," the veteran right-hander said Wednesday on a conference call. "My arm feels great. My body feels great."

Oswalt agreed to a minor league deal with the AL West-leading Rangers and is scheduled to make his first start for Triple-A Round Rock on Saturday.