Grogan, who was named the Bay’s best forward last season, joined Taranaki’s Spotswood United club at the beginning of this year, with the aim of securing an ITM spot.
Everything was going well until he injured his ACL ligament playing touch while warming up for Spotswood in February.
That put him out of action for 12 weeks but he battled back to regain a starting spot in a team featuring former GBHS players Micaiah Torrance-Reid and Jared Proffit.
“I did this latest injury against Inglewood a couple of weeks ago,” said Grogan.
“It was hard to take at the time but it has happened, and I’m determined to do whatever it takes to get it right.”
The 21-year-old plumber has time on his side and, as he has shown in the past, is a battler.
Bay assistant coach Dwayne Russell said he felt for Grogan.
“We were sorry to lose him to Taranaki but Mana (Otai, Bay coach) and I wanted to see him succeed,” Russell said.
“We both believe he has the ability and commitment to make it at ITM Cup level.
“He’s a player who leads from the front. He’s mature beyond his years and earned the respect of all the players last year.”