Russell Lamour Jr. of Portland lands a punch on his opponent Ahsandi Gibbs during the IBA North American Middleweight Championship at the Portland Expo. Saturday night, Derek Davis/Staff Photographer)

Jason Quirk of Scarborough celebrates after knocking out his opponent Brian Diaz in a middleweight bout at the Portland Expo. Derek Davis/Staff Photographer

A packed house of fans attend the boxing bouts at the Portland Expo. Derek Davis/Staff Photographer

Fans react after Jimmy Smith of Biddeford knocked out his opponent Moises Rivera during the first round of a light middleweight bout at the Portland Expo. Derek Davis/Staff Photographer

Jason Quirk of Scarborough delivers a blow to his opponent Brian Diaz during a middleweight bout at the Portland Expo. Derek Davis/Staff Photographer

Russell Lamour Jr. of Portland, left, competes with his opponent Ahsandi Gibbs during the IBA North American Middleweight Championship at the Portland Expo. Derek Davis/Staff Photographer

Jimmy Smith of Biddeford celebrates after knocking out his opponent Moises Rivera during the first round of a light middleweight bout at the Portland Expo. Derek Davis/Staff Photographer

Casey Kramlich of Raymond lands a punch on his opponent Jesus Cintron during a light middleweight bout at the Portland Expo.Derek Davis/Staff Photographer

A packed house of fans cheer during the boxing bouts at the Portland Expo. Photo by Derek Davis/Staff Photographer

Freddie Sanchez of Worcester, Mass., lands a punch on Brandon Berry of West Forks during a light welterweight bout at the Portland Expo. Derek Davis/Staff Photographer

Fans stand and cheer Russell Lamour Jr. of Portland during the IBA North American Middleweight Championship at the Portland Expo. Derek Davis/Staff Photographer

Freddie Sanchez of Worcester, Mass., avoids a punch by Brandon Berry of West Forks during a light welterweight bout at the Portland Expo. Derek Davis/Staff Photographer