Fitzgerald told the Arizona Republic that he has "no clue" about his future plans.
So, does that mean that the 35-year-old might be playing in his final home game on Sunday (4:05 p.m. ET) when the Cardinals (3-11) host the Los Angeles Rams (11-3) at State Farm Stadium?
"It may. It may not," Fitzgerald said. "NFL careers end every Sunday. I'm just blessed to be able to play the game I love."
Fitzgerald is on record as saying that if he does return to the NFL in 2019, it will be with Arizona.
"I have never had any desire to play anywhere else," the 6-foot-3, 218-pound Fitzgerald said. "I started here."
Fitzgerald overcame a slow start due to injury to collect 59 receptions for 645 yards and five touchdowns in 14 games this season.
An 11-time Pro Bowl selection, Fitzgerald matched his own franchise record in 2017 with 109 receptions while amassing 1,556 receiving yards and six touchdowns.
Fitzgerald has recorded 1,293 catches for 16,190 yards with 115 touchdowns in 232 career games since the Cardinals selected him with the third overall pick of the 2004 NFL Draft.