After getting strike two on Chad Tracy, Jackson began to shake his right hand as if something wasn't right. Rays manager Joe Maddon and head trainer Ron Porterfield made their way to the mound. After some lively discussion, Jackson handed over the ball.
Jason Hammel took over for Jackson, who is listed as day-to-day.
Bill Chastain is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.