The Tampa wideout was reportedly disgruntled with his role on Dirk Koetter's team throughout this past season ... and even reportedly requested a trade.

But ... per NFL Network's Ian Rapoport -- Arians wants to keep D-Jax on the team -- and is trying to get in touch with him.

Jackson says that conversation has yet to go down ... and when we asked about his football future at LAX -- Jackson wasn't so sure about a return to Florida in 2019.

"That's what I got an agent for, bro. I don't know, I just go play, bro. That's all I worry about."

Jackson does have one year left on his deal in Tampa ... but the Bucs can cut him this offseason without any salary cap ramifications.

Could that mean DeSean plays somewhere else in 2019??

"We'll see," he tells us.