To round out this thread, here is a little compilation I made.
These are the players who spent at least the length of a PTO (25 games) on an AHL roster. Despite the fact that some of these players spent a large part of the season with the same team, none of them were officially signed to a SPC (full year AHL contract).
A.J. Jenks - Played 27 games with Charlotte
Signed to a PTO on October 24, Released on January 2nd.
Andrew Rowe - Played 28 games with Charlotte
Signed to a PTO on November 2nd, Released on January 15.
Tyler Brown - Played 37 games with Hartford
Signed to a PTO on January 7.
Chad Nehring - Played 53 games with Hartford
Signed to a PTO on November 29.
Yan Danis - Played 24 games with Hartford
Signed to a PTO on January 1st
-Danis also served as a backup on multiple occasions.
-Danis also played 11 games with Norfolk (between November 10 and December 18) while signed to a PTO.
Joel Chouinard - Played 27 games with Iowa
Signed to a PTO on February 10.
-Chouinard also played 2 games with Grand Rapids while signed to a PTO.
Danny Syvret - Played 58 games with Iowa
Signed to a PTO on October 17, December 17, and February 17, Released on March 9.
-Syvret also signed a PTO with Wilkes-Barres on March 9. Syvret has dressed for 17 games for the Penguins.
Ian White - Played 34 games with Milwaukee
Signed to a PTO on December 17, Released on March 16.
-White also played 8 games with Providence while signed to a PTO.
Greg Miller - Played 35 games with Portland
Signed to a PTO on December 9 (Relased on December 26) and January 7.
Corey Trivino - Played 39 games with Portland
Signed to a PTO on November 18, Released on March 13.
Matt Pelech - Played 39 games with Rochester
Signed to a PTO on December 16 and February 15, Released on March 2nd.
Brodie Reid - Played 31 games with Rochester
Signed to a PTO on December 27 and February 27.
-Reid also played 11 games with Adirondack and one game with St. John's while signed to a PTO.
Brandon MacLean - Played 40 games with St. John's
Signed to a PTO on October 9.
A few more players also played over 25 games in the AHL with dressing for multiple teams.
Mike Cornell : Springfield (11 games), St. John's (15) and Charlotte (18)
Sahir Gill : Hamilton (25) and Wilkes-Barres (12)
Jared Nightingale : Hartford (6), Norfolk (20), Grand Rapids (2), Milwaukee (6) and Syracuse (8)