Sam Lavelle joined Grimsby in the summer of 2025 after leaving relegated Carlisle.
Hartlepool United have extended the loan of defender Sam Lavelle for a further month.
Lavelle, 30, has played five games for Pools since his arrival from League Two side Grimsby Town in October.
He had featured in just one EFL Trophy game this season for the Mariners before his switch to Hartlepool.