And it won't be his last time.
The four-star back went to Stanford's Junior Day solo last month, wanting to see the school for himself.
And on Thursday morning, McCaffrey announced he'll be spending a lot of time there, the next four years, in fact.
"Just committed to play football at Stanford University," McCaffrey tweeted on Thursday morning.
And with that, the top player in the state of Colorado joined the 2014 recruiting class for the Cardinal.
McCaffrey, ranked 14th nationally by Scout at running back, and the #3-running back in the West, became the second known commit to Stanford.
And he'll follow in the footsteps of his father, Ed McCaffrey, a longtime NFL receiver who played at Stanford in the 1980's.
McCaffrey joins four-star safety Brandon Simmons from Texas in Stanford's recruiting class.
Here is film from McCaffrey's junior season when Scout visited Colorado during the state playoffs, a game, in fact, that Stanford coaches were at.