- Apr 1 Stanley Cup Final, Mutual Street Arena, Toronto, ON: Jack Darragh scores a hat-trick as Ottawa Senators (NHL) beat Seattle Metropolitans (PCHA), 6-1 for a 3-2 series win
- Apr 19 24th Boston Marathon won by Peter Trivoulidas of Greece in 2:29:31
- Apr 20 Phillies manager Gravvy Cravath puts himself in as pinch hitter, his 3- run homer beats NY Giants 3-0
- Apr 25 Magda Julin of Sweden beats teammate Svea Norén for the gold medal in women's singles figure skating at the Antwerp Olympics
- Apr 26 Husband and wife team Ludowika & Walter Jakobsson representing Finland, win the pairs skating gold medal at the Antwerp Olympics; Ludowika is the only German-born athlete at the Games
- Apr 26 Ice hockey makes its Olympic debut at the Antwerp Games with center Frank Fredrickson scoring 7 goals in Canada's 12-1 drubbing of Sweden in the gold medal match
- Apr 27 Sweden takes the figure skating double at the Antwerp Olympics when Gillis Grafström wins his first of 3 consecutive men's gold medals; Magda Julin earlier wins the women's singles event
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