Matthew Edward Krook is an American professional baseball pitcher for the Baltimore Orioles of Major League Baseball (MLB). He has previously played in MLB for the New York Yankees. A native of Hillsborough, California, Krook pitched for the Oregon Ducks and was drafted by the Miami Marlins in the first round of the 2013 MLB draft and the San Francisco Giants in the fourth round of the 2016 MLB draft.

St. Ignatius College Preparatory, commonly referred to as SI, is a private, Catholic preparatory school in the Jesuit tradition, serving the San Francisco Bay Area since 1855. Located in the Archdiocese of San Francisco, in the Sunset District of San Francisco, St. Ignatius is one of the oldest secondary schools in the U.S. state of California.