A second-half hat-trick from Kevin Doyle saw Colorado Rapids cruise past Seongnam FC 4-2 in their opening preseason scrimmage of 2016 at the Olympic Training Center at Chula Vista in California.
The South Korean side, who finished fifth in the highly-respected K-League last season, took the lead in the opening stages by bundling home from a corner.
However, Rapids were level midway through the half when trialist Yann Ekra blasted a drive into the top corner of the net from distance.
Head coach Mastroeni changed his entire XI at the break and Rapids would quickly assume an unassailable lead.
Just two minutes into the second half, Doyle guided home a header from a right-wing cross then, shortly afterwards, nodded in following a corner from Marc Burch.
Seongnam reduced the arrears midway through the half, however Doyle stabbed home his third just before the final whistle.
First half: Froschauer, Kamdem, Sjoberg, Burling, Castillo, Cronin, Watts, Badji, Ekra, Pfeffer, Calvert.
Second half: MacMath, Burch, Torre, Keel, Hairston, Azira, Powers, Solignac, Appiah, Ownby, Doyle.
The Rapids season starts on Sunday, March 6 at 1 p.m. MT on the road against San Jose Earthquakes, with the Home Opener at Dick's Sporting Goods Park against LA Galaxy on Saturday, March 12 at 5 p.m. MT. For more information or to purchase season tickets, click HERE or call 303-825-GOAL.