Phil Jackson of Knicks and Jeanie Buss of Lakers Announce Their Breakup

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Phil Jackson and Jeanie Buss, one of the N.B.A.’s longest-running power couples, announced their breakup Tuesday night via social media.

Jackson, the president of the Knicks, and Buss, the president of the Los Angeles Lakers, had been engaged for several years but were never married. Jackson posted on his Twitter account a message signed with the initials P. J. and J. B.

“With mutual love and respect, we have decided to end our engagement,” Jackson’s statement read. “With the nature of our professional obligations and the geographic distance between us, sustaining the relationship has been difficult. We have shared many wonderful moments through the years, and we expect to remain supportive of each other in the future.”

Buss, who is also…