Richards pushing for start
Marc Richards may be fit to start for Chesterfield when former manager John Sheridan returns to the Proact Stadium with Plymouth on Tuesday night.
Richards suffered an ankle injury during the draw against his former club Port Vale on April 1 but returned to action as a 56th-minute substitute on Saturday as the Spireites kept their play-off hopes alive with a 2-2 draw against top-seven rivals Bradford thanks to Sam Togwell's injury-time equaliser.
Fellow striker Jack Lester has a back problem and could miss out.
Nathan Smith's absence with a broken foot aside Paul Cook, who succeeded Sheridan in October, has an otherwise fully-fit squad to choose from.
Defender Sam Hird, midfielders Danny Whitaker and Alex Henshall and striker Scott Boden were all on the bench against Bradford and are vying for recalls.
Plymouth will be without on-loan winger Jason Banton.
The npower League Two player of the month for March has been recalled by Crystal Palace boss Ian Holloway after six goals in 14 Argyle appearances.
Sheridan, whose Plymouth side are three points above the drop zone with three games to go, will also be without Oxford loanee Lee Cox with a shoulder injury.
Ronan Murray's thigh strain meant Plymouth did not have their full complement of seven substitutes for the 1-0 defeat at Burton on Saturday but the Ipswich loanee could be fit for the trip.
The experienced Paul Wotton (groin) also has a chance of being available as the Pilgrims look for three points which would ease their relegation fears.