Axios

The National Basketball Association has long been a league of dynasties, dating back to when George Mikan led the Minneapolis Lakers to five of the first eight championships. But those days may be over.

State of play: With the Denver Nuggets and Miami Heat playing for the title, this marks the first time in over 40 years — and just the sixth time ever — that the NBA will crown five different champions over a five-season span.

Atlanta Braves ace Spencer Strider struck out his 100th batter of the season on Sunday — in just 61 innings pitched.

Why it matters: That's the fastest any pitcher has reached 100 strikeouts in a season in modern Major League Baseball history (since 1900).

History is on the line this summer in Miami, which could win championships on both the hardwood and the ice.

State of play: The Miami Heat and Florida Panthers are chasing two rare feats as the National Basketball Association Finals and National Hockey League's Stanley Cup Final approach. Let's call them "the double" and "the grand slam."