The Phillies said Oswalt had a neck bruise but did not lose consciousness. The team said he was not dizzy before leaving Wednesday's game against Tampa Bay.
Oswalt fell to the ground and remained there until a trainer reached the mound to examine him. The right-hander stood up and after a brief discussion walked to the visiting clubhouse on his own.
METS: Reliever Jason Isringhausen threw a bullpen session after being sidelined with inflammation in his right elbow.
The two-time All-Star has had three Tommy John elbow surgeries throughout his 14-year career. Isringhausen, 38, hasn't pitched in the majors since elbow surgery in June 2009.
- Brad Emaus appears to be the frontrunner at second base for New York after it optioned Justin Turner to Triple-A Buffalo.
RANGERS: Texas right-hander Brandon Webb was scratched from a scheduled bullpen session because he was unable to get loosened up to pitch.
Webb, who planned to throw 60 to 70 pitches, has not pitched in the majors since Opening Day in 2009 with the Arizona Diamondbacks.
BLUE JAYS: Right-hander Brandon Morrow will start the regular season on the disabled list because of right forearm inflammation.
The Blue Jays announced the decision before Wednesday night's game against the New York Yankees.
CUBS: Relievers Justin Berg and Scott Maine were optioned to the minor leagues as part of four moves made to trim their roster to 36.
Right-handed reliever Angel Guzman and right-handed starter Todd Wellemeyer were sent to minor-league camp. Both were non-roster invitees.
YANKEES: Vice President Joe Biden visited New York's spring training camp Wednesday.
Biden spent around 30 minutes on the third-base side of George Steinbrenner Field on Wednesday while the Yankees were taking part in early defensive drills. He was with Sen. Bill Nelson , D-Fla., and both wore Yankees hats.
TEAMS' VALUE UP: Forbes ' annual report finds the average value of Major League Baseball teams has increased 7 percent from last year to an all-time high of $523 million.
The New York Yankees, worth $1.7 billion, lead the way for the 14th consecutive year since Forbes began valuing franchises in 1998.
Only three teams' values didn't increase: the New York Mets, San Diego Padres and Cleveland Indians.
JAPANESE BASEBALL: Opening Day in Japan has been pushed back until next week due to the effects of this month's earthquake and tsunami.