Life erased an 11-point halftime deficit to upend St. Mary's 16-14, adding USARFU's 2013 collegiate 15s title to its 2011 7s championship.
Separately, Jesuit and United nabbed high school and under-19 crowns with 21-16 and 24-10 wins over Gonzaga and Cathedral, respectively.
In Greensboro, North Carolina, the Gaels moved to a 14-3 edge behind converted tries from fullback Tim Maupin and center Mike Haley, but were shut down in the second stanza.
Running Eagle fullback Joe Cowley booted a penalty goal and then scored in the corner to narrow the gap to 14-11. Prop Drew Ohmann's 56th-minute try then gave Life its first lead while closing out the scoring in a match marred by second-half rainstorm.
In Elkhart, Indiana, a pair of tries from Devin Kelly helped Jesuit of Sacramento, California, capture a back-and-forth contest with Washington's Gonzaga. The win earned the Marauders their seventh US title.
Throttled by Indianapolis' Cathedral in the 2012 championship, Alpine, Utah's United this year turned the tables with a convincing four-try showing. The 2010 champs moved out to a 17-5 halftime edge en route to its second national crown.
Despite 2013's being the first year of independent organization, the single-school field was notably deep. In recent years Gonzaga, Charlotte, California's Dixon, and Utah's Herriman -- which dropped an 18-17 opening match to Jesuit -- have all made notable gains.
In the senior division 1 playoffs, unheralded New Orleans bested PAC and Minnesota's Metropolis, 57-8 and 15-10 respectively, to reach the final four.
Former Super League teams produced the remaining three qualifiers for the June 1-2 semifinals: Denver Barbarians, Life, and Old Puget Sound Beach. San Francisco Golden Gate, which withdrew its entrant from the division 1 playoffs, meets Life this weekend for the Elite Cup championship.
Some 30 national team hopefuls mustered in Glendale, Colorado, this past weekend in preparation for May 25's Pacific Nations Cup opener against Canada. The squad includes for recalls for prop Mike MacDonald, hooker Phil Thiel, flanker Peter Dahl, and utility back Troy Hall as well as the balance of America's overseas professionals. Twenty-four will travel to Edmonton for the first-round contest.
United States of America training squad
Forwards: Chris Biller (San Francisco Golden Gate), Todd Clever (NTT), Tom Coolican (New York AC), John Cullen (Univ. of Utah), Peter Dahl (Belmont Shore), Cam Dolan (Life), Brian Doyle (New York AC), Zach Fenoglio (Glendale), Eric Fry (London Scottish), Graham Harriman (Chicago Griffins), Mike MacDonald (Olympic Club), Liam Murphy (Boston), Shawn Pittman (Trinity College), John Quill (Dolphin), Louis Stanfill (Vicenza), Phil Thiel (Life), Nick Wallace (St. Mary's)
Backs: Shaun Davies (Glendale), Troy Hall (New York AC), Luke Hume (Old Blue), Seamus Kelly (Univ. of California), Toby L'Estrange (New York AC), Chad London (Glendale), Zach Pangelinan (OMBAC), James Paterson (Glendale), Chris Saint (Houston Athletic), Blaine Scully (undeclared), Robbie Shaw (Richmond), Adam Siddal (Old Blue), Andrew Suniula (Chicago Griffins)