Monday night's game between the Detroit Tigers and Kansas City Royals has been postponed due to rain. The game started in a mere delay, but with rain on the radar until at least 8:30 p.m. ET, the decision was made to just postpone it and make it up at a later date:
Tigers-Royals game tonight has been postponed due to rain. Game has been rescheduled for Monday, September 24 at 7:05 p.m. #tigers— Brian Britten (@BBritten_Tigers) April 30, 2012
September 24 was originally scheduled to be an off-day for both teams, but they agreed to play then rather than play a doubleheader during the first weekend of July, Kansas City's other visit to Detroit.
The Tigers haven't announced how the rotation will shake out as a result, but my guess is that everyone will get pushed back a day and Duane Below will still make his first start of the season tomorrow.