The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
Sounds like the cutting/ change of direction may be a contributing factor. Work up/down stream of where you are experiencing the issue. Hamstring, quad, calf for starters voodoo wrap, leopard claw or leopard paw will address some aspects. Check out some of the post run episodes as well.
Is the leg only tight after playing flag football?