"The Pirates went to work on their arbitration-eligible players Friday, signing reliever Chris Resop to a one-year, $850,000 contract, according to a source.

That leaves six arbitration-eligible players remaining.

The team and the players must exchange their desired salaries by Tuesday, although they can continue to negotiate after that time.

"The number that you file kind of impacts the negotiations," general manager Neal Huntington said earlier this week.

The right-handed Resop, 29, appeared in 76 games for the Pirates in 2011, striking out 79 in 692/3 innings.

He made $431,500 last season. The Pirates claimed him off waivers from the Atlanta Braves in August 2010.

Joel Hanrahan, Evan Meek, Charlie Morton, Jeff Karstens and Casey McGehee all have at least three but less than six years of major league service time, making them eligible for arbitration.

Garrett Jones qualifies as a "Super 2," meaning he ranked in the top 17 percent, in terms of service time, of players with at least two years in the majors."