Billingsley (elbow) did not make his scheduled rehab start Monday due to a stomach illness, the Phillies' official site reports. Billingsley could make his next start later this week. He has a 3.24 ERA in two rehab starts with Triple-A Lehigh Valley. He is expected to join the Phillies' rotation early next month.

Billingsley (elbow) said the plan is for him to make three more rehab starts before joining the Phillies' rotation, the Philadelphia Inquirer reports. That puts Billingsley on a schedule to join the Phillies in the first week of May. His next rehab start will come Monday or Tuesday.

Billingsley (elbow) tossed five innings in a rehab start with Triple-A Lehigh Valley on Wednesday, Stephen Gross of The Morning Call reports. Billingsley was sharp Wednesday, giving up no runs on two hits and posting a 3:2 K:BB ratio. It seems likely he will throw at least once more in the minors before the Phillies consider activating him, but he is getting close to being ready to join the big league rotation.

Billingsley (elbow) said he felt good after making his first rehab start Friday with Triple-A Lehigh Valley, the Philadelphia Daily News reports. "Overall, I was happy with it," Billingsley said. "My curveball was good and my fastball was loose. I came out of it healthy, and that's a big plus." Billingsley allowed three earned runs on four hits, including two home runs. He struck out four and walked one. His fastball topped out at 93 mph. He will make his next rehab start Wednesday.

Billingsley (elbow) is scheduled to begin a rehab assignment with Triple-A Lehigh Valley on Friday, MLB.com's Todd Zolecki reports. Billingsley is on track to join the Philadelphia rotation at some point in April, but his rehab assignment will likely entail at least two or three starts. Once he's ready, he'll likely replace Sean O'Sullivan, although Jerome Williams might be in some danger if he starts slow.

The Phillies placed Billingsley (elbow) on the 15-day disabled list Sunday, the team's official site reports. Billingsley is working his way back from surgery on the flexor tendon in his right arm. He is expected to join the Phillies' rotation before the end of April.

Billingsley (elbow) struck out one batter over three shutout innings in a minor-league game Thursday, allowing one hit and one walk, MLB.com's Todd Zolecki reports. While Billingsley only needed 40 pitches to get through three innings, it appears he won't have a chance to make an appearance in the Grapefruit League. He'll spend time at extended spring training and/or on a rehab assignment, with late April likely still the target. So long as the rehab assignment doesn't go too poorly, Billingsley should eventually claim a spot in the Phillies' starting rotation.

Billingsley (elbow) pitched two scoreless innings Thursday in a minor league game against the Yankees' Triple-A affiliate, the Phillies' official site reports. Billingsley said afterward that his arm feels good. He is unsure if he will pitch in another minor league game or a Grapefruit League game next. The Phillies hope he can join their rotation before the end of April.

Billingsley (elbow) is expected to throw 30-to-35 pitches in a minor league game Thursday, MLB.com's Todd Zolecki reports. Billingsley hopes to make a Grapefruit League appearance before the end of spring training, but he isn't expected to join the big-league rotation any sooner than late April. He threw 18 pitches in a minor league game over the weekend.

Billingsley (elbow) threw 18 pitches in one inning during a minor league game Saturday, the Phillies' official site reports. Billingsley is working his way back from surgery on the flexor tendon in his right arm. The Phillies hope to get him into a spring training game before the regular season begins. He won't be ready to join the rotation until late-April.