Grimshaw made his debut for the club back in December 2013, and the centre-half went on to make 164 appearances during the Colls’ climb up the leagues.
Manager Brad Cooke said: “Grimmy is a gentle giant, an absolutely top bloke who played with me prior to Cleggy coming in. He has been top drawer on and off the pitch, although game time has been limited in the past couple of seasons his presence behind the scenes has been just as important.
“He has a great footballing mind and I am sure he will continue in the game when the time comes to gang up his boots.
“We both agreed the time was right for him to take in a new challenge. Someone is getting a great lad and a top player.”
Versatile Sherlock first joined the club in 2015, and has remained there since, save for a brief spell away in March 2018.
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