TORONTO - Mike Brown of Perth, Ont., upset defending champion Morgan Knabe of Calgary in comeback style Tuesday to win the men's 200-metre breaststroke at the 2001 Summer Nationals swimming competition.

It was also a big day for Calgary's Rick Say who earned his second and third gold medals of the meet winning the 100 and 400 freestyle.

Brown, 17, clocked a personal best two minutes and 16.16 seconds for his first career Canadian title. He was third at the halfway mark but roared to the lead on the next length.

Knabe, an Olympic and world championship finalist in the 100 breaststroke, was second in 2:16.46 while Michel Boulianne of Montreal was third in 2:17.94.

"It feels really good to show that I can be on top of the podium too," said Brown, who has trained with the Perth Stingrays since he started swimming at age seven. "All I could think about on the last turn was to head for the wall as fast as I can."

In the women's 200 breaststroke, Christin Petelski of Victoria successfully defended her title clocking 2:31.88 with Rhiannon Leier of Winnipeg second in 2:32.06 and Annamay Pierse of Edmonton third in 2:32.66.

Petelski, an Olympic finalist in 1996, wanted to rebound form a disappointing showing at the world championships last month.

"It's a good end to a bad half of the year," said Petelski, who led the race most of the way. "It was hard to come here and swim after the world championships but I set my mind towards ending the season on a high note."

Say, who anchored two relay teams to national records at the world championships last month, took the 100 freestyle in a personal best 50.85 then the 400 freestyle in 3:54.48. He also won the 800 freestyle on Sunday.

Mike Mintenko of Vancouver and Jennifer Carroll of Montreal won men's and women's 50 butterfly respectively; Mark Versfeld of Vancouver and Erin Gammel of Calgary were the men's and women's 100 backstroke winners; Jessica Deglau of Vancouver took the women's 400 freestyle and Laura Nicholls of Waterloo, Ont., the women's 100 freestyle.