Rangers paid £2m for Mexican midfielder Pena but he made just 12 Scottish Premiership appearances - and is now in Poland with GKS Tychy.
Carlos Pena cost Rangers £2 million in 2017 but played his 12 Scottish Premiership games under Pedro Caixinha.
Rangers let Carlos Pena leave Ibrox earlier this month.
Pena failed to feature under the Rangers manager, Steven Gerrard, at Ibrox.
Rangers have released midfielder Carlos Pena.
Ibrox side Glasgow Rangers finally got shot of Carlos Pena today.
Glasgow Rangers announced that Carlos Pena has left Ibrox.
Pena has seen his contract at Rangers terminated after a dismal spell.
Pena had no future at Rangers and it seems he is set to leave on loan again.
Rangers manager Steven Gerrard looks set to call time on Pena's Ibrox career.
The Rangers midfielder was banished from Ibrox in January but could get a chance to impress Steven Gerrard when he returns in the new year.
Pedro Caixinha has been sacked by Rangers, now questions are being asked about Carlos Pena and Eduardo Herrera's futures.
Glasgow Rangers brought 11 players to Ibrox over the summer, including eight permanent signings and three loan deals.