Ereck Flowers has hired super-agent Drew Rosenhaus, which could set the stage for a contract showdown with the Giants.

The Giants must decide whether to pick up Flowers' fifth-year option, which would pay him approximately $12.5 million, prior to the beginning of the regular season, but there does not appear to be movement in that direction.

Flowers has yet to report for any of the Giants' voluntary offseason workouts and was absent from last week's voluntary minicamp at the Quest Diagnostics Training Center, which did not sit well with Giants general manager Dave Gettleman.

"He's in Miami and we're here," Gettleman said during the NFL Draft. "He decided not to come. He's an adult. He has the ability to make decisions on his own. This is a voluntary program and he's decided to stay in Miami. If you want to know why he's not here, call him."

Calls to Flowers and his agent at the time -- his father -- went unreturned.

Flowers' salary cap hit for 2018 is $4.57 million, none of which comes off the books if he is released.

Calls and texts to Rosenhaus have not been returned.

Rosenhaus could have Flowers report to the remaining offseason workouts and practices as a show of good faith to the Giants in hopes of negotiating a new deal for Flowers, the No. 9 overall pick in the 2015 NFL Draft.

However, it is more likely that Rosenhaus was hired to get Flowers out of East Rutherford and help negotiate his next deal. It would not be surprising to see Flowers or Rosenhaus request a trade -- or for Rosehaus to ask the Giants for permission to shop his new client.

After making left tackle Nate Solder the highest-paid offensive lineman in the NFL during free agency, the Giants plan to move Flowers to right tackle, but they have not guaranteed him a starting position.

"It depends -- until you actually get your hands on somebody and work with them," Giants offensive line coach Hal Hunter said recently of Flowers' position-change. "Nobody is a real blank slate. He's had a high school coach, he's had a college coach, I believe he's had two [offensive line] coaches here since he's been here. Everybody has different ways, so sometimes you have to erase the tape. Sometimes you can't just re-record over it."

Matt Lombardo may be reached at MLombardo@njadvancemedia.com. Follow him on Twitter @MattLombardoNFL