For Jose Altuve to finish his career with a .300 batting average he would need to hit .290 over the rest of his contract

This is with him averaging 150 games per year.

Also for him to end up in the 3000 club and have a .300 career average he would need to average 150 games/550 plate appearances/159 hits per year which would put him at 3012 hits for his career.