Ask the UEFL - Clemson vs South Carolina Runner Tagged Out After Base on Balls?

During Saturday's Clemson-SCar NCAA baseball game, Tigers baserunner Dylan Brewer was declared out after being awarded second base on a ball four call to the batter. Was the umpire's call correct or should the walk have protected Brewer? Article: https://www.closecallsports.com/2021/03/ask-uefl-runner-tagged-out-after-base.html In 2017, a somewhat similar situation occurred at the MLB level in Seattle: None out, runner on first base running on the pitch, and a 3-2 count on the batter. In both situations, the batter took the pitch for ball four and in both situations, the catcher attempted to throw the runner from first base out at second. Official Baseball Rule 5.05(b)(1) comment gives us our answer: "If, in advancing [to an awarded base], the base runner thinks there is a play and he slides past the base before or after touching it he may be put out by the fielder tagging him." In Seattle, baserunner Jean Segura ran past second base, but Astros fielder Jose Altuve failed to actually tag Segura when he was past second base. During the Clemson game, baserunner Brewer slid into second base without liability to be put out—the tag of his helmet was effectively meaningless—but then stepped off the base and, having been deemed past the awarded base, was properly called out when subsequently tagged.