Conversation so far:
Who did Jackson play for in 80-81?
As he entered the last year of his Yankee contract in 1981.
What happened during that last year with the Yankees?
Jackson endured several difficulties from George Steinbrenner.
What kind of difficulties?
Jackson expected Steinbrenner to work out a new contract for him as well.
Steinbrenner never did.
Did Steinbrenner and Jackson butt heads about anything else?
when the 1981 Major League Baseball strike began, Steinbrenner invoked a clause in Jackson's contract forcing him to take a complete physical examination.
What was the result of that physical examination?
Jackson was outraged and blasted Steinbrenner in the media.
Did their feud continue?
When the season resumed, Jackson's hitting improved, partly to show Steinbrenner he wasn't finished as a player.
What was his record that season?
He hit a long home run into the upper deck in Game Five of the strike-forced 1981 American League Division Series with the Brewers.
Was the tension with Steinbrenner ever resolved?
Jackson was medically cleared to play Game Three, but manager Bob Lemon refused to start him or even play him, allegedly acting under orders from Steinbrenner.

Question: Are there any other relevant facts from this time period?
Self-contained rewrite: besides hitting a long home run, are there any other relevant facts on Jackson?