Buddy tape. I would buddy tape middle finger to ring finger a few daya after the finger is reduced back in place to allow early motion and at the same time stabilize finger amd prevent another dislocation.
Needs reduction. A dislocation needs to be reduced and the bones put back into place before taping - normally after reduction we will tape 2-3 fingers together as "buddy taping" which forms an effective splint.
6-12 weeks. I recommend continued buddy strapping during at-risk sports for 6-12 weeks after injury. Better safe than sorry. Remember to get those hands up in anticipation of the ball!