Matthews' double-double leads Michigan past Grizzlies, 74-55

Michigan's Charles Matthews, front. keeps the ball in play in front of Montana's Sayeed Pridgett during the first half of a first round men's college basketball game in the NCAA Tournament in Des Moines, Iowa, Thursday, March 21, 2019. (AP Photo/Nati Harnik)

Montana guard Sayeed Pridgett, left, drives between Michigan's Ignas Brazdeikis (13) and Jordan Poole, right during a first round men's college basketball game in the NCAA Tournament, Thursday, March 21, 2019, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)

Michigan's Jon Teske (15) celebrates after scoring a three-point basket during the first half of a first round men's college basketball game against Montana in the NCAA Tournament in Des Moines, Iowa, Thursday, March 21, 2019. (AP Photo/Nati Harnik)

Montana coach Travis DeCuire calls a play during the first half of a first round men's college basketball game against Michigan in the NCAA Tournament in Des Moines, Iowa, Thursday, March 21, 2019. (AP Photo/Nati Harnik)

Michigan guard Jordan Poole shoots over Montana guard Timmy Falls, left, during a first round men's college basketball game in the NCAA Tournament, Thursday, March 21, 2019, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)

Montana guard Ahmaad Rorie sits on the bench with teammate Michael Oguine, left, at the end of a first round men's college basketball game against Michigan in the NCAA Tournament, Thursday, March 21, 2019, in Des Moines, Iowa. Michigan won 74-55. (AP Photo/Charlie Neibergall)

Michigan coach John Beilein, right, talks to Zavier Simpson, left,during the first half of a first round men's college basketball game against Montana in the NCAA Tournament in Des Moines, Iowa, Thursday, March 21, 2019. (AP Photo/Nati Harnik)

The Michigan bench joins in with Zavier Simpson (3) as he shoots for three points during the second half of a first round men's college basketball game against Montana in the NCAA Tournament in Des Moines, Iowa, Thursday, March 21, 2019. (AP Photo/Nati Harnik)