Frank J. Schwindel (born June 29, 1992), nicknamed "Frank The Tank", is an American professional baseball first baseman for the Orix Buffaloes of Nippon Professional Baseball (NPB). He previously played in Major League Baseball for the Kansas City Royals, Oakland Athletics, and Chicago Cubs.
On July 18, 2021, the Chicago Cubs claimed Schwindel off waivers and optioned him to the Triple-A Iowa Cubs. The Cubs promoted Schwindel to the major leagues on July 30, after they traded Anthony Rizzo. Schwindel hit .344 with six home runs, 18 RBIs, a .394 on-base with a .635 slugging and a 1.030 OPS in August, and won the National League Rookie of the Month Award. On September 5, Schwindel hit a go-ahead grand slam that put the Cubs up to stay in an 11-8 win over the Pirates. His grand slam was the third go-ahead grand slam in the game, tying a Major League record. Two days later, he was named the NL Player of the Week for the week of August 30 to September 5. In his first full major league season, between Oakland and Chicago, Schwindel batted .326 with 14 home runs and 43 RBIs, which despite only playing in 64 games was good enough to earn him two votes in National League Rookie of the Year voting, tying him for sixth place with Tyler Stephenson.