The Pirates and Scott Olsen, a left-hander who will turn 27 in January, are close to agreement on a one-year, major-league contract based largely on incentive bonuses, and the agreement could be finalized later this week.
Last year with Washington, Olsen had a base salary of $1 million and could have made up to an additional $2.85 million in bonuses based on starts.
Olsen's deal with the Pirates is expected to be similar.
Olsen has a 4.85 ERA in 127 career starts, including the past two seasons with the Nationals. He also has been involved in numerous negative off-field incidents, including a DUI charge in 2007.