Season Ends for Stewart Purssell of MSL Athletic Club KC Wednesday, May 26th , 2055 Stewart Purssell of the U-18 just might have to call it quits for the season. The 18-year-old MSL Athletic Club KC starting pitcher received a possible season-ending injury against the MSL Boston Patriots recently at MSL Boston Ballpark. Purssell suffered a damaged elbow ligament while throwing a pitch. The U-18 medical staff said he could be out quite some time, as much as 16 months.