Date of birth
Born: Luton, 19th December 1986
Calvin signed a two-year contract at the Crown Oil Arena in July 2014, a deal which has since been extended to the end of the 2019/20 season.
The 31-year-old started his career with hometown club, Luton, in 2004 and spent four seasons at Kenilworth Road, which included loan spells at Grimsby and Bristol City, before linking-up with Crystal Palace.
He was used mainly as a substitute during his time with The Eagles and went out on loan to Brighton, Millwall, Swindon and Leyton Orient, before joining Port Vale in July 2012.
After helping Vale to promotion to League One in 2012/13, Calvin spent the following season with Mansfield and York.
The forward has been a regular appearance maker during his time with Dale, and has become a firm fans favourite, as well as an important asset both on and off the pitch.