(Crew SC photo) (Crew SC photo)

D.C. United bolstered the frontline Wednesday by acquiring Costa Rican forward Jairo Arrieta from Orlando City in exchange for an international roster slot.

Arrieta, 31, scored 17 goals in three seasons with the Columbus Crew before Orlando selected him in the MLS expansion draft last month. He has served on the Costa Rican national team periodically as well.

He is the second internationally seasoned player to join United this week. On Monday, the club signed Finnish national team midfielder-defender Markus Halsti, who appeared in the UEFA Champions League with Swedish side Malmo.

United’s first competitive matches of 2015 will come against Costa Rica’s Alajuelense in the CONCACAF Champions League quarterfinals, Feb. 26 and March 4.

Before moving to MLS in 2012, Arrieta played six years with Saprissa, Alajuelense’s league rival.

With the Crew, Arrieta posted nine goals and four assists in 18 regular season matches in 2012. He had three and four in 26 games in 2013 and five goals and one assist in 23 matches (14 starts) last year.

For United, he will add depth to a frontline corps that will be without co-leading scorer Fabian Espindola for the first six regular season matches. Espindola was suspended by MLS for shoving an assistant referee in the playoffs.

Arrieta is a permanent resident and does not count against the international player limit. He earned $135,000 last season.