Mine went from 210 to 240 in 2020 (winter of junior year in HS) lifting in the basement with his sister and adding an entire meal. Most of the eating and lifting happened from 8pm - 1am (it was like we were housing and feeding a vampire bodybuilder). It happened over a 3-4-month period. The 30 pounds didn’t slow him dawn—he got faster.
He gained another 10 pound during 6 weeks of winter conditioning this past January. He did not feel like the extra weight added power. That weight came off during spring training and he’s holding steady at around 240 now. I expect he will slowly add weight and man muscle as he gets older (he’s 6’7” and 19 yrs old) but he will most likely stay on the solid but rangy side.