Former San Francisco 49ers QB Colin Kaepernick put out an open invitation for wide receivers to get some work in with him. Several NFL players have taken him up on his offer too including players like Seattle Seahawks WR Tyler Lockett and Chicago Bears QB Justin Fields.

“For The past 5 years, I’ve been working out and staying ready in case an opportunity to play presented itself. I’m really grateful to my trainer, who I’ve been throwing to all this time. But man, do I miss throwing to professional route runners. Who’s working?? I will pull up,” Kaepernick shared on Twitter.

At least one member of the Kansas City Chiefs has taken Kaepernick up on his offer. On Saturday, photographer Knarly Designs snapped some photos of Chiefs WR Daurice Fountain, Philadelphia Eagles WR Jalen Reagor and soon-to-be NFL draft pick Danny Gray out of Southern Methodist working with Kaepernick in Dallas, Texas.

Check it out:

Fountain, 26, came on strong for the Chiefs late last season. The team made Josh Gordon a healthy scratch several times, eventually cutting him from the 53-man roster, in favor of elevating Fountain from the practice squad. He mostly played on special teams, but with the departure of Byron Pringle and potentially Demarcus Robinson, Fountain has a big opportunity ahead of him in Kansas City next year.

It’s good to see him out taking every possible opportunity to get better, including catching passes from a former NFL quarterback who is hoping to get another chance in the league.