in 1999 and 2000, he continued his strong pitching. he posted a career high total for wins in a single season in 1999 (7), and achieved a rare feat by striking out 4 batters in an inning against the san francisco giants on august 17. in 2000, kline was actually used as the closer in june and part of july, amassing a career best 14 saves. he would actually lead or tie for the lead in major league baseball for relief appearances in both seasons, demonstrating his durability, and the fact that he was a key reliever who had earned the trust of his manager.