Nolan Ryan is a legendary baseball great who played for the New York Mets, California Angels, Houston Astros, and Texas Rangers. He is widely considered to be one of the greatest pitchers of all time, having set numerous records during his 27-year career. He was inducted into the Baseball Hall of Fame in 1999. His last name, Ryan, is the answer to the crossword puzzle clue 'Baseball Great Nolan' (4 letters).