Sprout would never get into another big league game. After that season, Sprout continued to struggle with his control, netting over 100 walks in the 1962 while going 10-11, 4.01 in 29 games, 26 starts. His next season, in 1963, saw him go 3-13, 4.77 and he would never make another minor league start. He made a total of 14 appearances over the course of the 1964 and 1965 seasons finishing off his professional pitching career.
He will be forever known for a fantastic outing he had in the 1960 season when he was just 18. Pitching for the Decatur Commodores of the Midwest League, he threw a no hitter on 8/18. During the no hitter, he struck out a record 22 batters in the game. He walked 8 and struck out the last two batters to obtain the feat, one that Sprout himself was quoted at not being as aware of. However, his catcher Owen Johnson, intentionally let a foul pop up drop to allow Sprout attempt to fan the next batter. It must have been an interesting decision, because the catcher would have to face the music if Sprout allowed a hit to the next batter. A catch of the foul ball would have not only ended the game, but preserved the no hitter. Sprout made Johnson look good by fanning the next batter and finishing the game with an incredible 22 Ks.