Columbus, OH (SportsNetwork.com) - Ethan Finlay scored on either side of the intermission and added an assist on Saturday as Columbus Crew SC rolled to a 4-1 rout of the Philadelphia Union at Mapfre Stadium.

Columbus entered the match in fine form, hoping to extend its unbeaten streak to four matches, which they easily achieved as Kei Kamara, Finlay and Justin Meram all scored in the first half to ease to victory.

Philadelphia's struggles continued as the club followed up a 2-1 loss at home to New England with a disappointing outing on Saturday and have just one win through their first nine games of the season.

The home side opened the scoring after 21 minutes when Tony Tchani sprayed a long ball down the right flank for Finlay to chase. Finlay sent a looping cross to the back post where Kamara controlled with one touch and slotted it past Union goalkeeper John McCarthy.

Crew SC then doubled the lead in the 32nd minute when Waylon Francis sent a cross into the box that fell between Union defenders Steven Vitoria and Fabinho, allowing Finlay to sneak in and knock it home.

Columbus then put an exclamation point on a stellar first half in stoppage time when Meram collected the ball on the left flank, drove into the box and let one go that bounced off McCarthy and rolled into the net.

Philadelphia pulled one back in the 64th minute as C.J. Sapong did well to beat his mark to the end line and send a cross into the box where rookie Eric Ayuk Mbu was there to nod it home for his first goal in MLS.

But the Crew continued to seek offensive opportunities and made it 4-1 in the 73rd minute as Kamara fed it through in behind the Union defense and Finlay was there to slide it past McCarthy to the far post for his second tally of the night.

Philadelphia failed to muster many offensive chances after Finlay bagged his second goal and suffered its fifth loss of the season.