2008-09: Troy Grosenick appeared in 24 games as a backup to 19-year-old Mike Johnson in his first season with the USHL's Cedar Rapids RoughRiders. He was 13-5-4 with 1 shutout and had a 2.33 goals against and .910 save percentage. Cedar Rapids finished second in the Eastern Conference and lost to eventual Clark Cup champion Indiana in the first round of the playoffs. Grosenick made one playoff appearance — stopping 5 of 7 shots in 38 minutes of action.
2009-10: Grosenick took over as the starter for Cedar Rapids in his second season. He was 26-14-2 with 4 shutouts in 44 regular season games and had a 2.63 goals against and .902 save percentage. The RoughRiders finished second in the Eastern Conference and again lost to Indiana in a five-game playoff series. Grosenick was 2-1 with 1 shutout and had a 1.88 goals against and .949 save percentage before suffering a knee injury in Game 4. In March 2010 he committed to playing college hockey at Union College in 2010-11.
2010-11: Grosenick appeared in three games for Union College as a freshman. With junior Keith Kinkaid (New Jersey) entrenched as the Dutchmen starter, Grosenick had 1 tie and had a 2.12 goals against and .897 save percentage in 84 minutes of action.
2011-12: Grosenick assumed the starting goalie role for Union College as a sophomore. In 34 games he was 22-6-3 with 5 shutouts and had a 1.65 goals against and .936 save percentage. Union won the ECAC Hockey regular season and playoff championships and defeated Massachusetts-Lowell, 4.2, in the NCAA East Regional final to reach the Frozen Four. The Dutchmen lost to Ferris State, 3-1, in a Frozen Four semifinal game.
2012-13: Grosenick signed a one-year entry-level contract with San Jose as a free agent following his junior season after back-stopping Union College to an ECAC Hockey playoff championship and the NCAA East Regional Final. He was 18-11-5 in 34 games for the Dutchmen and had a 2.12 goals against and .926 save percentage. Union won the ECAC Hockey playoff championship after finishing fourth in the regular season and defeated defending national champion Boston College before falling to Quinnipiac in the NCAA East Regional final.
Grosenick is battler. He is not the most structurally sound goaltender, and his rebound control comes under much scrutiny, especially his blocker control and rebounds with high shots. He is however, very quick, very athletic, and is known to have an incredible work ethic. His left glove is above average, and his post play is savvy.
He has suffered a series of leg injuries but the severity of them seems to be minor, so his long term health should not be held in question. He sometimes will play a little too deep in his net, and will sometimes be forced to make an acrobatic save because he was out of position.
Having burned his entry-level contract in a bargaining move the Sharks lost some control over their prospect’s future. Grosenick now owns the right to refuse assignment to the ECHL, so it would seem likely that he is destined to back-up Sateri in Worcester of the AHL, however if Anderson out-duels him at camp there could be a potential controversy. It will be an exciting first professional year to say the least.