Complex sentence: He set career highs with 222 hits, 136 runs, 580 at-bats, and 52 stolen bases; his stolen base tally was a team record until Tommy Harper stole 54 bases in 1973.
Split into simpler sentences: He set career highs with 222 hits, 136 runs, 580 at-bats, and 52 stolen bases. Speaker's stolen base tally was a team record until Tommy Harper stole 54 bases in 1973.