Siewert leads No. 23 Colorado past Washington State 78-56

Colorado guard D'Shawn Schwartz, right, looks to pass the ball as Washington State guard Noah Williams defends in the first half of an NCAA college basketball game Thursday, Jan. 23, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)

Colorado guard McKinley Wright IV jokes with teammates as he heads to the bench late in the second half of an NCAA college basketball game against Washington State Thursday, Jan. 23, 2020, in Boulder, Colo. Colorado won 78-56. (AP Photo/David Zalubowski)

Washington State forward CJ Elleby, right, drives to the rim as Colorado guard D'Shawn Schwartz defends in the first half of an NCAA college basketball game Thursday, Jan. 23, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)

Colorado forward Dallas Walton, left, drives to the rim as Washington State forwards Jeff Pollard, center, and CJ Elleby defend in the first half of an NCAA college basketball game Thursday, Jan. 23, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)

Colorado guard McKinley Wright IV, left, looks to pass the ball as Washington State guard Jervae Robinson defends in the first half of an NCAA college basketball game Thursday, Jan. 23, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)

Washington State forward CJ Elleby drives up the court with the ball against Colorado in the first half of an NCAA college basketball game Thursday, Jan. 23, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)

Colorado forward Evan Battey, left, drives past Washington State forward DJ Rodman in the first half of an NCAA college basketball game Thursday, Jan. 23, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)