Portadown have made three players available during the transfer window.
The newly-promoted Danske Bank Premiership side announced on Wednesday that Liam McKenna, Marty Bradley and Aaron Duke are all on the transfer list.
The Shamrock Park side said it "welcomes enquiries in relation to all three players".
Midfielder McKenna came to Portadown after playing under manager Matthew Tipton at Warrenpoint Town.
McKenna - who had a loan spell with Knockbreda in 2018 - made 18 appearances in the NIFL Championship last season, scoring one goal.
Bradley joined Portadown in January 2019 from Immaculata and was previously on Linfield's books, helping the Windsor Park club's Swifts side win the Steel and Sons Cup.
The midfielder made 14 appearances in the Championship last term and also featured in the Mid Ulster Cup.
Meanwhile, Duke joined the Ports in January last year, arriving from the Mid Ulster League. He spent part of last season on loan with Dollingstown.
The forward scored five goals in 15 league appearances last term.
