Injuries to baseball players heavily influence the statistical output of a baseball player over time. Missing time due to injuries complicates the prediction of a player's future performance. Collecting comprehensive data on injuries is difficult, thus no complete databases are available. Injured players often continue to play, which can exacerbate injuries and reduce performance. We propose a model for expected playing time for pitchers based on performance and player characteristics. The model is constructed using data from the 2005-2007 seasons and blind validation is applied to demonstrate the power of the model. This flexible model allows for the calculation of expected playing time for pitcher on a weekly basis during the season. Such a tool is useful not only for analysis, but also for teams to monitor players for possible injuries based on decreases in performance.