In mid-December, Derrickson stood 6-foot-6. He showed a skilled game, showcased a consistent jump shot, but appeared out of shape. Fast forward to early April and Derrickson now stands 6-foot-7 and checks in at a slim 230-pounds.
"I just worked on eating better," Derrickson said shortly after being announced as the 15's tournament MVP. "I made sure I got into the gym and lifted and worked on my game everyday. I ended up thinning out a little bit."
Derrickson's coach at Fairfax (Va.) Paul VI – Glenn Farello – said they laid out a program for him and he bought it.
"He's worked extremely hard on his flexibility and on his strength," Farello told Scout.com. "We do a year round program, so we lift every day during the season."
"Our strength conditioning coach Brandon Brodnex has done a phenomenal job with specifically Marcus," he added. "Marcus has taken it very seriously and we've also put him on a pretty strict diet."
His refined frame has certainly helped his game. At times this past weekend, Derrickson was flat out dominant on the offensive end. At his size, he has terrific hands and footwork, to go with an impressive jump shot.
"I try to work on a little bit of everything, my ball handling, shooting, passing, everything," Derrickson said. "I just like making the best plays to win a game."
"If I have a smaller defender I can post him up or get to the hole, if they come up I'll just shoot the three or drive to the hole."
While Derrickson is just a 2015 prospect, he already has high major scholarship offers.