Konecny (50-5, 23 KOs) was simply overmatched against the methodical Quillin (31-0, 22 KOs), who was unable to truly impose himself but won by scores of 120-108, 119-109 and 119-109. ESPN.com also had it a 120-108 shutout.
"He was a tough customer, and he came to fight. I'm here to inspire kids. That's my mission and goal," Quillin said. "We can always throw more jabs. There are tons of things I can do. I will go back home and watch the tape and see what I need to do."
Konecny, 35, of the Czech Republic, got off to a terribly slow start as Quillin, 30, of New York, outlanded him 32-6, according to CompuBox statistics, in the first round. Quillin worked behind a strong jab and mixed in right hands and hooks against Konecny, who did little but cover up and walk forward without throwing many punches.
He picked up the pace a bit as the fight went on, but Quillin was still in control and appeared to hurt him at the end of the sixth round, when they got into an exchange. Quillin kept up a steady attack of landing lefts to the body and following with lefts to the head. Konecny was trying to fight back and landed some decent shots but not nearly enough to win rounds. In the eighth round, Quillin caught him with a right hand that bloodied his nose.
Konecny continued to plug ahead late in the fight and caught Quillin a few times, but nothing hard enough to do any damage or come close to a knockdown.
Next up for Quillin could be a summer match with fellow Brooklyn fighter Daniel Jacobs, who was ringside to call the card for Showtime as an analyst.
"If Danny Jacobs is next and the money is right, let's do it," Quillin said, adding that he would also like to fight champion Sergio Martinez or the winner of the proposed July showdown between super middleweight Julio Cesar Chavez Jr. and Gennady Golovkin, although those two bouts are unlikely given the promotional and television network issues.
Quillin had scored 12 knockdowns in his past four bouts, but he didn't come close to dropping Konecny, a 2000 Olympian, former European junior middleweight champion and former two-time world-title challenger.
"It was nothing I didn't expect," Konecny said. "I would have expected a harder fight. Quillin is a good fighter, a good champion, but not a great one. But he beat me."
• Brooklyn welterweight Sadam Ali (19-0, 12 KOs), 25, a 2008 U.S. Olympian, blew out Michael Clark (44-10-1, 18 KOs), 40, of Columbus, Ohio, by knocking him out in the first round. Ali landed a hard right-left combination that dropped Clark to his rear end near the ropes, and referee Joseph Cooper counted him out at 2 minutes, 6 seconds. Clark, who didn't appear to make much of an effort to get up, dropped to 3-5 in his past eight fights and has now been stopped in the first round in two fights in a row. He was a late replacement for Jeremy Bryan (17-3, 7 KOs) of Paterson, N.J, who dropped out because of a thumb injury.
• Light heavyweight Marcus Browne (10-0, 7 KOs), 23, a 2012 U.S. Olympian from Staten Island, N.Y., rolled past steppingstone opponent Otis Griffin (24-16-2, 10 KOs), 36, of Troy, Ala. Griffin, has lost six fights in a row, 10 of his past 11 bouts and was no match for the speed and accuracy of Brown, a southpaw. Brown scored a knockdown on a straight left hand in the fifth round and coasted to a shutout decision, 80-71 on all three scorecards.