But Fowler, who has a long-standing friendship with Mariners boss Mike Newell, has no previous coaching experience
"A couple of weeks ago the manager had some discussions with Robbie and then asked me if we could potentially take it forward for Robbie to come in in a playing/coaching capacity," added Fenty.
"In truth we were trying to avoid this becoming a public issue but I think I needed to clarify the situation."
Fowler is the fourth highest goalscorer in Premier League history, with 161 goals in the top flight to his name.
Grimsby are 22nd in the League Two table, with only Bournemouth and Luton beneath them.
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