Typically won't be done growing in terms of weight till around 3 years old. I'd say he likely has another 10-15lbs of weight to grow. He's approaching the age where he'll stop growing in height.
Here are the breed size standards according to the AKC website:
Height: 24-26 inches (male), 22-24 inches (female)
Weight: 65-90 pounds (male), 50-70 pounds (female)
Jax - 2 year old WGWL GSD, 125lbs
Leeroy - 3 year old Rottweiler Pit Bull Mix, 120lbs
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