sentences:  Welp was selected 16th overall, in the National Basketball Association (NBA)'s 1987 Draft, by the Philadelphia 76ers, and he played three seasons in the NBA.In December 1987, he slipped on a wet court in Chicago, the night after a Blackhawks' hockey game.Welp remembered, "There was condensation on the floor, and the ball boys were mopping the floor the whole game," and the injury "was so severe, my knee never got back to the level it was before.