My 16yr old son had a grade level 2 strain of his hamstring muscle and a 2.5 inch tear of the attaching tendon making one too many stretches for bad throws at 1st B. He's doing PT 5 days a week and meeting with the therapist 2 days per week. Injury occurred 4/17.
He's up to 2 miles/day power walk w/o any pain so yesterday swapped out 1/4 mile of circuit to a light jog. Also does the bevy of rubber band things and various stretching. Mixes in swimming. Additionally does 5x40yd backward running 3x per week.
He's unable to pitch, throw hard, crow hop w/o pain yet.
PT and Doc figure it should be no problem if he sticks to the PT plan to be ready to play again May 25 summer season opener, about a 6 week thing but it depends on a lot of things.
I'll keep you informed. Luck