Stupid Fast by Geoff Herbach (2012-2013)

 

Felton Reinstein's  sudden growth spurt transforms him from a geeky loner into a popular athlete--strong, fast and stupid. Dazed and confused, Felton is busy with his new friends, sports, and beautiful girlfriend. Meanwhile, his younger brother is obsessed with their father's suicide, and his mother is sliding into mental illness.  Can Felton get smart in time to save his family?