(COLORADO SPRINGS, COLO.) – A new era of Olympic-style boxing began on Monday as the USA Boxing National Championships opened competition with a full array of new rules taking affect for the 323 tournament participants. Monday’s action showcased only male participants with boxers in the elite, senior and youth divisions taking the ring for the first session at the HUB Sports Center in Spokane, Wash.

Marshall Sanchez (Houston, Texas) claimed a historic victory in his flyweight elite men’s bout with Abel Soriano (Belleveue, Neb.), taking the first Olympic-style boxing match to be contested without headgear in nearly two decades.  Sanchez won a split decision victory over Soriano in the contest to advance on to a quarterfinal match-up with number one seed Shawn Simpson (Chicago, Ill.) on Thursday.

2011 Light Flyweight National Champion David Carlton (Cincinnati, Ohio) dropped his 2013 National Championships opener in the second elite men’s bout of the tournament, losing a unanimous decision to Malik Jackson (Washington DC).

Bantamweight Matthew Guerrero (Manteca, Calif.) enjoyed a first as well, winning the first-ever youth division bout in USA Boxing National Championships action. Guerrero won a unanimous decision victory over Hector Valdez (Dallas, Texas) in their preliminary round contest.

The new 10-point must scoring system has provided new terminology for Olympic-style boxing and bantamweight Ramon Cardenas (San Antonio, Texas) won the first knockout of the tournament. Cardenas’ knockout came at the 1:21 mark of the third round in his preliminary contest with Homero Palomino. Cardenas win advances him on in the youth men’s bantamweight bracket.

The only TKO in Monday’s early session took place in the elite men’s light welterweight division. Jose Alday (Odessa, Texas) enjoyed a quick outing in his tournament opener, taking the TKO win at the 2:36 mark of the first round.

The evening session showcased eighteen bouts in the youth males’ lightweight and welterweight divisions and the elite men’s welterweight and heavyweight classes. The two TKO victories of the evening session came in back-to-back bouts in the youth males’ lightweight division. Anthony Marsella (Smithfield, R.I.) took the first of the two early victories in his preliminary contest with Richard Quiterio (Minneapolis, Minn.). Marsella put an end to the bout at 2:40 point in the final round, riding the TKO victory to a berth in the second round where he will face Kolby Dinius-Lecoure (Butte, Mont.) on Tuesday.

With a corner full of Gary Russells guiding him, including his older brother, 2008 Olympian Gary Russell, Jr., younger sibling Gary Antwuan Russell (Capitol Heights, Md.) took the second TKO win over Brannon Terry (Little Rock, Ark.). Terry’s corner threw the towel in at the 2:07 mark of the third round, giving Russell his first victory of the 2013 USA Boxing National Championships. He moves on to a second round showdown with 2012 Junior Olympic National Champion Christian Bermudez (Brooklyn, N.Y.) in Tuesday’s competition.

The elite men’s heavyweight division closed the evening’s competition and heavyweight Joshua Temple (St. Louis, Mo.) made his mark on the opening day, winning the sole knockout of the evening session early in his bout with Manuel Contreras (St. Paul, Minn.). Temple floored Contreras in the opening round, ending the contest in the first stanza. The victory advances Temple to Thursday’s quarterfinals.

USA Boxing National Championships action will resume on Tuesday with preliminary action in the youth and senior men’s divisions and the elite women’s classes at 11 a.m. and 5 p.m.

Monday Results

5 p.m. session

132 lbs/youth male: Michael Aguayo, Dallas, Texas, dec. Elijah Shabazz, Woodstock, Calif., 2-1

132 lbs/youth male: Eder Carrillo, Woodland, Calif., dec. Jaime Guerrero, Irving, Texas, 3-0

132 lbs/youth male: Jousce Gonzalez, Glendora, Calif., dec. Jamaine Ortiz-Rodriguez, Worcester, Mass., 2-1

132 lbs/youth male: Anthony Marsella, Smithfield, R.I., won on TKO over Richard Quiterio, Minneapolis, Minn., TKO-3 (2:40)

132 lbs/youth male: Gary Antwuan Russell, Capitol Heights, Md., won on TKO over Brannon Terry, Little Rock, Ark., TKO-3 (2:47)

132 lbs/youth male: Genaro Gamez, San Diego, Calif., dec. Kenneth Davis, Reno, Nev., 3-0

132 lbs/youth male: Thomas Velasquez, Philadelphia, P., dec. Hector Rendon, Tacoma, Wash., 2-1

152 lbs/youth male: Joshua Ramirez, McKinney, Texas won on walkover over Daniel Lopez, Oxnard, Calif., W/O

152 lbs/youth male: Adrian Gutierrez, Chula Vista, Calif., dec. Terrance Reed, Waasso, Okla., 2-1

152 lbs/elite male: Hakim Bryant, Asbury Park, N.J., dec. Arnold Barboza, West Covina, Calif., 2-1

152 lbs/elite male: Javaune James, Miramar, Fla., dec. Roshawn McCain, Tucson, Ariz., 3-0

152 lbs/elite male: Jamontay Clark, Cincinnati, Ohio dec. Daniel Baiz, San Antonio, Texas, 3-0

152 lbs/elite male: Ve Shawn Owens, St. Louis, Park, Minn., dec. Anthony Miller, Wilmington, Del., 3-0

201 lbs/elite male: Joseph Martinez, Durante, Calif., dec. David Paul, Los Angeles, Calif., 3-0

201 lbs/elite male: Atenion Eatman, Durham, N.C., won on walkover over Marquice Weston, Tacoma, Wash., W/O

201 lbs/elite male: Earl Newman, Jr., Brooklyn, N.Y., dec. Anthony Hall, Santa Rosa, Calif., 2-1

11 a.m. session

123 lbs/youth male: Matthew Guerrero, Manteca, Calif., dec. Hector Valdez, Dallas, Texas, 2-1

123 lbs/youth male: Francisco Martinez, Dallas, Texas, dec. Neslan Machado, Miami, Fla., 3-0

123 lbs/youth male: Efren Lopez, Fresno, Calif., dec. Victor Vela, Norwalk, Calif., 3-0

123 lbs/youth male: Jayvon Garnett, Cincinnati, Ohio dec. Carlos Carrillo, Denver, Colo., 3-0

123 lbs/youth male: Jarico O’Quinn, Lansing, Mich., dec. Homero Palomino, Muscatine, Iowa, 3-0

114 lbs/elite male: Marshall Sanchez, Houston, Texas, dec. Abel Soriano, Bellevue, Neb., 3-0

114 lbs/elite male: Malik Jackson, Washington DC dec. David Carlton, Cincinnati, Ohio, 3-0

114 lbs/elite male: Gabriel Montoya, Cheyenne, Wyo., dec. Luis Montoya, Tolleson, Ariz., 3-0

123 lbs/elite male: Eduardo Martinez, Aurora, Ill., dec. Dennis Galarza, Orlando, Fla., 3-0

123 lbs/elite male: Ramon Cardenas, San Antonio, won on knockout over Homero Palomino, Chula Vista, Calif., KO-3 (1:21)

123 lbs/youth male: Javar Jones, Anderson, Ind., dec. Ruben-Paul Mendoza, San Antonio, Texas, 3-0

132 lbs/senior male: Domonique Griffin, Irving, Texas dec. Julio Parra, Denver, Colo., 2-1

132 lbs/senior male: Dustin Southichack, San Antonio, Texas dec. Gary Riley, Temple Hills, Md., 2-1

141 lbs/elite male: Jayquran Hazel, Brooklyn, N.Y., dec. Danson Rellez, Mount View, Hawaii, 3-0

141 lbs/elite male: Nicholas Jefferson, Tacoma, Wash., dec. Evander Lamourt, New Port Richey, Fla., 3-0

141 lbs/elite male: Jose Alday, Odessa, Texas won on TKO over Juliano Zanetti, Three Forks, Mont., TKO-1 (2:36)

141 lbs/elite male: Carlos Castillo, Tucson, Ariz., dec. LaDarius Miller, Las Vegas, Nev., 2-1

141 lbs/senior male: Damon Allen, Philadelphia, Pa., dec. Anthony Nunez, Niskayuna, N.Y., 2-1

141 lbs/senior male: Timothy Ramos, Framingham, Mass., dec. Eriberto Limon, Kennewick, Wash., 3-0