CHICAGO (AP) _ Left-hander Mike Sirotka and the Chicago White Sox agreed Wednesday to a contract extension covering at least the next two years.

Sirotka, 28, is 7-9 with a 3.47 ERA with two complete games and one shutout in 20 starts this season.

If he is eligible for salary arbitration, he would receive $1.4 million in 2000 with a chance to earn an additional $475,000 in performance bonuses. He also would receive retroactive pay to increase his salary this year from $285,000 to $500,000.

If he is not eligible for arbitration, Sirotka still would receive the retroactive pay but would earn $550,000 for 2000 with $325,000 in incentives. In 2001, he would receive a base salary of $2 million.

Either way, the White Sox are buying out his first year of salary arbitration.

``I had no desire to go through that process,'' Sirotka said.

It won't be known until November if Sirotka is eligible for arbitration. He needs to be in the top 17 percent by service time among those players with 2-3 years in the majors.

``I want to be one of the five pitchers who helps us get to the point where we can be competitive,'' Sirotka said. ``It's been a long journey to get here. Now, I'd like it to be the beginning of great things with this organization.''

In five seasons with Chicago, Sirotka is 26-28 with a 4.43 ERA in 81 games, including 67 starts. He led the White Sox with 14 wins last season.

``Mike has done everything we could ask of him, both on and off the field,'' White Sox general manager Ron Schueler said. ``He really stepped up to become a leader on our pitching staff in 1998 and has continued that consistency this season. He battles and gives us a chance to win every time out.''