2012: Arrieta made his MLS debut with the Black & Gold on 7/14, recording his first assist the next week on Chris Birchall's game-winning goal against D.C. United. The following week, Arrieta struck the net twice in a 2-1 road win at Sporting Kansas City to win MLS Player of the Week honors. In 18 matches, Arrieta scored nine goals and tallied four assists to earn a share of the Crew's Golden Boot award. During his first season in MLS, Arrieta recorded three multi-goal matches to catapult him into the Crew's top 10 career standings.
Arrieta joined the Crew from Deportivo Saprissa of the Costa Rican First Division, where he has scored 45 goals over the last five seasons and was goal scoring runner-up in the 2011 Campeonato de Invierno.
The 5-9, 150-pound native of Nicoya, Costa Rica, began his career in 2004 when Brujas FC contracted him for their inaugural season. While at Brujas, he appeared in 56 matches and scored 11 goals over two seasons.
In 2006 Arrieta transferred to Saprissa, the most successful club in Costa Rica where he was a teammate of current Crew forward Olman Vargas. There he appeared in 161 matches, recording 45 goals and helping the team win five Costa Rican first-division championships.
Arrieta also started in the Crew’s historic 1-0 win at Saprissa on Sept. 16, 2009 and appeared as a substitute in the return leg, a 1-1 draw at Crew Stadium on Sept. 29, 2009.
Arrieta has been capped three times by the Costa Rican national team, starting friendly matches vs. Cuba on Dec. 11, 2011 and Jamaica on March, 21, 2012, as well as appearing as a substitute in a friendly vs. Venezuela on Dec. 22, 2011.