WASHINGTON -- The Nationals will make it official Thursday afternoon when they introduce first baseman/outfielder Adam Dunn at a 3 p.m. ET news conference at Nationals Park. Dunn agreed to a two-year, $20 million contract on Wednesday.

Dunn, 29, and general manager Jim Bowden have a history together with the Reds organization. Bowden drafted Dunn in the second round of the 1998 First-Year Player Draft. Three years later, Dunn was in the big leagues and eventually would become Cincinnati's best power hitter.

Dunn, who will join Ryan Zimmerman in the middle of the lineup, has hit at least 40 home runs for five straight years. Although he has a .247 career batting average, he has a .381 on-base percentage and can play both left field and first base.

There are two drawbacks to Dunn's game. He strikes out a lot and is considered a below-average defensive first baseman and outfielder.

The Nationals have been looking for a left-handed slugger since the 2008 season ended. Their top choice was first baseman Mark Teixeira, but he ended up signing with the Yankees last December.

The team then targeted Dunn, and it seemed both sides reached a stalemate by mid-January. It was reported that Dunn exceeded the Nationals' price range and teams such as the Dodgers and Angels appeared to have had the inside track to acquire Dunn. But negotiations between Dunn and the Nationals started to heat up in the past week.