One of the original members of Wheaton's first varsity team in 1998, Ryan Parker is entering his ninth season as an assistant coach in 2013. In the summer of 2008, Parker helped lead the Harwich Mariners to the Cape Cod Baseball League (CCBL) Championship, as he assisted with the pitching staff.

This is Parker's second coaching stint with the Lyons, as he assisted in 2003 before returning in 2006 to work primarily with the pitchers. During the 2004 and 2005 seasons, Parker was the assistant coach at Roger Williams University in Bristol, Rhode Island. At Roger Williams, Parker developed the pitching staff in addition to recruiting.

A 2001 Wheaton graduate with a degree in sociology, Parker appeared in 46 career games over four years, making 35 relief appearances while posting a 7-4 record. He has the distinction of being the winning pitcher in the Lyons' first New England Women's and Men's Athletic Conference (NEWMAC) Tournament championship game, as Parker tossed six innings during a 4-0 win over Springfield College on April 26, 1999. Parker also recorded the first save in program history, which occurred on March 20, 1998, against the State University of New York at Old Westbury.