MEDFORD, Mass. — Former Brunswick High School student/athlete Mitchell Black, a junior on the Tufts men’s track team, is the undisputed king of the 800- meters at the NCAA Division III Championships after winning the outdoor 800 title on Saturday at St. Lawrence University.

Black added the victory to the NCAA Indoor 800 crown he won in March.

Running in a nine-man final, Black took the lead at the top of the stretch and was not be denied, He finished with a 1:52.57 winning time to edge Wisconsin- LaCrosse senior Sean Royer (1:52.89) and Ramapo freshman Jeremy Hernandez (1:52.90).

The seven-time All-American was the No. 2 qualifier in the NCAA outdoor 800 with a 1:49.83 time, which won the New England Intercollegiate Amateur Athletic Association (NEICAAA) title at MIT on May 9. Only Buffalo State junior Austin Becker ran a faster 800 during the Division III outdoor season (1:49.74).

Black was the top returnee to the NCAA 800 field. He was the runner-up in the race last season with a 1:51.30 time. On Friday, he pulled away from the pack and won the first heat of the 800 meters with ease in a 1:50.60 time to advance to Saturday’s final.

Competing at the JDL Fast Track in Winston- Salem, N.C. on March 14, Black won the 2015 NCAA Division III indoor championship in the 800 with a 1:51.94 time. The NCAA title was the first by a member of the Tufts team since Fred Jones won the triple jump at the 2006 NCAA Outdoor Championships. Black’s was the first in a running event since David Patterson was first in the 3,000 meter Steeplechase at the 2001 NCAA outdoor meet.

Black entered March’s indoor meet ranked No. 1 in the 800. He was the fourth runner in D-III indoor history to run a sub-1:50 in the event, timing 1:49.16 at Boston University’s David Hemery Valentine Invite on Feb. 13. The time was the fastest in Division III since Ben Scheetz of Amherst set the DIII record of 1:47.43 at the NEICAAA Championships in 2012.

Also part of Tufts’ eighthplace 4 x 400 relay (3:18.80) at the 2015 NCAA indoor meet, Black was selected as the U.S. Track & Field and Cross Country Coaches Association NCAA Division III National Track Athlete of the Year for the indoor season. Black was also third in the 800 indoors in 2014. He has three relay All-American honors indoors and another outdoor 800 All- American award from 2013 (seventh place).

On Friday, he was announced as a Capital One Academic All-District 1 Men’s Track & Field/Cross Country team member.

This is the sixth straight national championship for which Black has qualified since starting his career for head coach Ethan Barron’s Tufts program. His qualifying time for this year’s race is the school record.