Ryan Cochrane and Tianna Rissling led Canadian podium sweeps while Cesar Cielo and Joanna Maranhao collected titles for Brazil at USA Swimming's Missouri Grand Prix meet Saturday. Canadian swimmers are in training for Olympic trials that begin in Montreal on March 27 and showed their form for a fourth podium sweep of the meet after having done it in the women's 200m freestyle and 100m breaststroke Friday. Cochrane won the 400m freestyle in 3mins 53.47secs with Keegan Zanatta 0.13sec behind and Kier Maitland third in 3:56.18. Rissling flipped spots with Jillian Tyler from the 100m breaststroke sweep to capture the 200m breaststroke Saturday in 2:27.98 with Tyler second in 2:29.93 and Mariya Chekanovych third in 2:30.05. In a showdown of sprint stars, Cielo won the 50m freestyle in 22.13 seconds with Frenchman Frederick Bousquet second in 22.26 and American Jason Lezak third in 22.75. Maranhao won the 200m butterfly in 2:09.73 with American Elaine Breeden second in 2:10.14. In the women's 100m backstroke, American Rachel Bootsma won in 1:00.20, edging France's Laure Manaudou by 0.6sec with Canada's Julia Wilkinson third in 1:01.08. American Amanda Weir won the women's 50m freestyle in 25.44 with Jane Trepp .05 behind. American Eric Shanteau won the men's 200m breast in a meet-record 2:10.47, lowering his own mark from 2008 by 0.39 of a second, while Joseph Schooling won the 200 butterfly in 2:00.08 and Matt Grevers took the 100 backstroke in 53.57. Grevers invited his girlfriend, US swim teammate Annie Chandler, onto the podium with him to celebrate his victory and then got down on one knee and proposed marriage to Chandler, who said yes. “I took it out a little fast because my heart was racing the whole time,” Grevers said. “If I didn't get first it wouldn't have worked out so well. I've just been searching for a unique way to pop the question. My whole family is here and I figured it would be a perfect opportunity and a unique situation.”