Triston Casas' Impact on Red Sox Lineup and Momentum.

Triston Casas of the Boston Red Sox admitted that he should have made the play on Gavin Sheets' ground ball to first base in the ninth inning, which led to the Chicago White Sox's walkoff win on Saturday. The official scorer initially ruled it an error but later changed it to a single. Casas has struggled on defense this season, with negative-6 defensive runs saved entering Saturday. Manager Alex Cora previously talked about how the rookie needs to improve his first step.