Grosenick, 27, was named the winner of the Aldege "Baz" Bastien Award as the American Hockey League's (AHL) top goaltender, finishing the season ranked 2nd in the league in wins (30), T-2nd in save percentage (.926), 3rd in goals-against average (2.04), and 1st in shutouts (10). The fourth-year pro was selected to the 2016-17 AHL First All-Star Team and was named CCM/AHL Goaltender of the Month for February. In addition, he won CCM/AHL Player of the Week twice, on Dec. 12 and Feb. 20. Grosenick had a stretch from Nov. 17-Dec. 18 where he did not allow a goal in 248 minutes and eight seconds of play. In 15 Calder Cup Playoff games, Grosenick helped lead the Barracuda to its first Western Conference Finals in franchise history, posting an 8-7 record with a 2.69 goal-against average, a .910 save percentage and two shutouts.

In 2014-15, Grosenick became the first netminder in Sharks history to record a shutout in his NHL debut by turning aside 45 shots against the Carolina Hurricanes on Nov. 16. He would end the year by going 1-1 with a .948 save percentage and 1.53 goals-against average for San Jose. In his rookie campaign that same season, Grosenick led all Worcester goaltenders in goals-against average (2.62) and save percentage (.903).

Grosenick capped off his collegiate career at Union College ranking fourth amongst all ECAC goaltenders in goals-against average (2.12.), save percentage (.926) and winning percentage (.609) during the 2012-13 season. He was also named Most Outstanding Player of the 2013 ECAC Hockey Tournament, earning a spot on the all-tournament team. As a junior, he won the Ken Dryden Award as ECAC Hockey Goaltender of the Year, was recognized as a First-Team AHCA All-American and became the first Union player to be named a finalist for the Hobey Baker Award.

The six-foot-one, 185-pound native of Brookfield, WI, was originally signed by the Sharks as a free agent on April 3, 2013.