Two other players, Minnesota Twins' Park Byung-ho and former Seattle Mariners first baseman Lee Dae-ho, each homered in their third big league game last year.

Hwang recorded his first major league RBI in his second at-bat in the fourth inning, with a comebacker to Freeland. With the men at the corners with one out in the fourth, Hwang hit a bouncer back to the pitcher, who had the ball go off his glove and only had the play at first when he fielded the ball. That allowed Joe Panik to score from third, as the Giants cut the deficit to 2-1.

Hwang grounded out to third in his first at-bat and struck out in his final at-bat. The Giants went on to down the Rockies 5-3.

The 29-year-old signed a split contract -- different salary rates for time spent in the majors and the minors -- with the Giants in January, having turned down a more lucrative offer to stay in the Korea Baseball Organization. Despite leading the club in RBIs in spring training and being voted the team's best rookie, Hwang failed to make the Opening Day roster and toiled in the Triple-A Sacramento for a few months.

Hwang had an opt-out clause in his contract that would allow him to declare free agency if the Giants didn't promote him by July 1. Earlier this week, Hwang expressed his intention to exercise that right without a call-up.

The Giants had a sudden need for an extra infielder when third baseman Conor Gillaspie went down with lower back pains. They placed him on the disabled list and brought Hwang up to the major leagues for the first time for Wednesday's tilt. (Yonhap)