Warner, ranked No. 3 at 197, entered the third period tied, 3-3. He trailed 4-3 following a Brucki escaped, but grabbed his first and only lead of the match with three seconds on the clock.
"As the match went on I felt stronger and stronger," Warner said. "I got that takedown and I was a dog on a bone. I got to that leg, and I need to get there more, but when I got to that leg I wasn't letting go."
Iowa won four of five matches after intermission to put the dual out of reach. Alex Marinelli won by fall in 6:20. Michael Kemerer won by 19-4 technical fall at 174, and Tony Cassioppi closed the dual with a 10-2 major decision at 285.
Iowa led 12-6 at the break, getting wins from No. 1 DeSanto at 133, No. 9 Murin at 141, and No. 3 Lugo at 149.
Lugo scored a reversal with 10 seconds left in the first tiebreak to defeat No. 14 Mike D'Angelo, 3-2. It was his third straight win against a ranked opponent. DeSanto racked up 12 takedowns in a 25-10 technical fall, and Murin used four takedowns and 3:30 of riding time to earn a 12-2 major decision.
"Going to overtime I knew I was going to get the win. I was calm, cool and collected," Lugo said.
Lugo nearly escaped to tie the match, 2-2, but failed to clear D'Angelo and came back with the match-winning reverse.
"I thought about taking the one, but if the two is there I'm going to take it," Lugo said. "I thought it was there, we got into a little scramble and I knew I didn't have much time and couldn't stay there and wait for the stalemate. I have to go and can't put the match in the ref's hands."
Iowa won seven-of-10 bouts and owned a 37-5 advantage in takedowns to earn the 30-9 win in front of 2,284 fans at Jadwin Gymnasium.
Iowa returns to the mat Dec. 29-30 at the 2019 Midlands Championships in Hoffman Estates, Illinois.
125 -- #4 Patrick Glory (P) dec. Aaron Cashman (IA), 10-4; 3-0; 0-3
133 -- #1 Austin DeSanto (IA) tech. fall Sean Pierson (P), 25-10; 5-3
141 -- #9 Max Murin (IA) major dec. Marshall Keller (P), 12-2; 9-3
149 -- #3 Pat Lugo (IA) dec. #14 Mike D'Angelo (P), 3-2 TB1; 12-3
157 -- #9 Quincy Monday (P) dec. #4 Kaleb Young (IA), 3-2; 12-6
165 -- #2 Alex Marinelli (IA) pinned Connor Melbourne (P), 6:20; 18-6
174 -- #3 Michael Kemerer (IA) tech. fall Kevin Parker (P), 19-4; 23-6
184 -- Travis Stefanik (P) dec. #10 Nelson Brands (IA), 7-6; 23-9
197 -- #3 Jacob Warner (IA) dec. #2 Patrick Brucki (P), 5-4; 26-9
285 -- #3 Tony Cassioppi (IA) major dec. Aiden Conner (P), 10-2; 30-9
Records: Iowa (4-0), Princeton (1-2)