Keeper arrives to bolster competition.Charlton Athletic goalkeeper John Sullivan has become boss Joe Dunne's latest signing, ahead of the trip to Crewe this weekend.
John has joined the U's for a month - running until December 6th - and will be available for the match against the Alex, subject to final paperwork clearance.
The signature of the 24-year-old shot stopper will add competition for places at the back as the U's look to further close the gap on the top six in the coming weeks.
"That sort of competition is important for the squad and this will bring out the best in the players we already have.
Boss Joe Dunne said: "I am very pleased to bring in John, and we've got some good competition for places now. He started his career at Brighton and
Sullivan is yet to play for Charlton, following a switch from Millwall in the summer of 2011.
"John is a very good goalkeeper who will compete with Mark for that place in the team, and hopefully it will see them push each other on in the time that he's with us at Colchester United."
went on to make 17 appearances for his home town club.
A move to Millwall followed in the summer of 2009, and the Lions loaned him out to Yeovil in the 2010/11 season, where he made 17 appearances for the Glovers.
Later that season, he went out on loan to Charlton, and played four times for the Addicks.
That was enough to persuade them to move in for his permanent signature that summer.
John will now contest the first team goalkeeper spot with Mark.