Heck, you got a monster!
In 8th grade, I was 4'9" and 72 lbs., playing 90's exponent basketball and longjumping in the spring. In 10th grade, I STARTED both ways in JV football at 5'1" and, ..... ehem, 101 lbs. Rule you had to weigh over 100 for football in those days.
One of my ex girlfriends has pictures of herself in 5th grade at 5'7" and 140 lbs.
Ingrid Shutter was 6' tall in 5th grade. When I saw her 45 years later, she was exactly my height. Ended up she slouch's, wore flats, and me in my contruction work boots with arch supports.