Michael Coulson and Damien McCrory have extended their loan spells with League Two strugglers Grimsby.
Plymouth defender McCrory will remain at Blundell Park until 16th January while midfielder Coulson, who is on loan from Barnsley, has prolonged his stay until 23rd January.
Both players joined the struggling League Two club last month as they look to escape relegation danger.
McCrory told the club's official website: "I have been well looked after here and I have fitted in well.
"Initially I just wanted to get as many games under my belt as I can but I have really enjoyed it."