Hamilton could not be reached for comment, but he announced the switch on Twitter early Saturday afternoon:
"After sitting down and talking with my parents about my future I have decided to decommit from Michigan. I would like to thank all of the Michigan coaches, Staff, fans, and supporters. I appreciated everything that they have done for me throughout this process. I have nothing but respect for Michigan. Moving forward I will be attending Stanford University for the next 4-5 years to further my education and my athletic career. My family and I decided that this is the best decision for me and my future."
Stanford had been one of Hamilton's top three programs when he committed to the Wolverines in June. At the time, Hamilton said he liked Michigan coach Jim Harbaugh's quirky approach and he liked the tradition at The Big House. A 3.5 GPA student, he said he was also drawn by the academics as he considered majoring in business or biology.
Hamilton, listed at 6 feet 7 and 295 pounds, was part of the top offensive line in the Baltimore area last fall, helping the No. 1 Greyhounds run for 2,995 yards and 48 touchdowns. They won the MIAA A Conference championship, finishing with a 10-1 record and the No. 13 ranking in USA Today's Super 25.
The four-star recruit is rated the No. 24 offensive tackle in the country and the No. 10 overall player in Maryland in the Class of 2016 by recruiting website Rivals.com.
With national signing day on Wednesday, Hamilton is the second Gilman player to flip his commitment in the past 10 days. Fellow All-Metro offensive tackle Stephen Spanellis switched his commitment from Virginia to Michigan where he had hoped to play with his high school teammate.
At Stanford, Hamilton will be joined by Maddox, who ran for 13 touchdowns this fall, including the game winner in the 100th rivalry game against No. 2 McDonogh.
Maddox had been considering Army, Air Force, Holy Cross and Ivy League programs Princeton, Brown and Dartmouth, but he jumped at the opportunity to head to Palo Alto, Calif., when the offer came Friday night
"The school speaks for itself," Maddox said. "A lot of people have been asking what are you looking for in a college and things like that. So, high-caliber athletics along with high-caliber academics and Stanford is the perfect place for that."
Maddox, who has an 87 academic average on a scale of 100, hasn't decided on a course of study, but is considering engineering.
The 5-10, 215-pound Maddox ran for 670 yards last season, but he was also captain of the Greyhounds defense, where he played linebacker. He had 56 tackles, two sacks and an interception. But he said he wanted to play running back in college.
Maddox has not visited Stanford, but he received his offer in person at his home from head coach David Shaw Friday night. He said yes right away and plans to visit Palo Alto next week.
While several of his Greyhounds teammates committed last summer and eight had committed by early October, Maddox said he wanted to take his time but also said the offers were a little slow to come his way.
"It was a little bit of both, but I wanted to take my time to see where I could see myself fitting in," Maddox said. "Now I feel like a big weight has been lifted off my shoulders and I feel a big sense of accomplishment."
Maddox also said it will be great to have Hamilton at Stanford with him, because he has no other connections in northern California.
Six other Greyhounds have committed to Division I programs: defensive tackle Ellison Jordan (Penn State), offensive linemen Wes Mehl (Navy) and Stewart Keehner (Georgetown), cornerback Korey Stevens (Villanova), wide receiver John Fitzgerald (Cornell) and linebacker Shamar Shanks (Monmouth).