Pena failed to feature under the Rangers manager, Steven Gerrard, at Ibrox.
Carlos Pena looks set to continue his career in Polish football after Rangers terminated his contract last month.
Rangers’ decision allows Pena to sign for any club for whom the transfer window is currently open, such as those in Poland.
According to the Scottish Sun, the Mexican has travelled back to Europe for talks there this week.
And Pena is alleged to have told the newspaper that top flight clubs are now interested in signing him, as well as second-tier side, GKS Tychy.
“At Rangers, it did not go the way I wanted, but I must look to move forward now,” the midfielder is quoted as saying.
“I have a new opportunity in Poland. I’m (almost) 29 now and I know this is my last chance to get back to the top of my game.
“I admit the mistakes I made at Rangers and back in Mexico, but I have learned from them.
“I believe I can return to the level I was at that saw me play for my country. I am in a good physical state, I am emotionally in a good place too and with work and dedication, I know I can get back to where I was. I feel I have matured as a person.
“In Poland, I already have a contract offer from GKS Tychy in their second division, but I now have offers too from clubs in their top division.”
Rangers paid £2.7 million to sign Pena from C.D. Guadalajara at the start of last season [Transfermarkt], but the 28-year-old only played 14 times for the Gers, scoring five goals, before returning to Mexico a year ago.
He was first loaned to Cruz Azul before Club Necaxa took over his registration last summer, although neither spell can be considered successful.
Is Pena one of Rangers’ biggest ever recruitment mistakes?