City led at half time thanks to a Kevin Cooper goal. The home side were reduced to 10 men when their skipper was sent off for 2 yellow cards.
Half time saw six changes to the starting line up and the new look line up were punished immediately when Kellen Holden headed home a long throw.
City were soon back in control. The lively Michael Chopra put City 2 - 1 up before Steve Thompson soon made it 3 - 1.
Chopra was involved in City's 4th as he was fouled in the box and Darren Purse scored from the spot.
Next up for City is a match in the impressive Qwest Stadium, Seattle on Tuesday to face the Seattle Sounders.
Cardiff City: M Howard, N Ardley D Purse (capt), R Johnson, C Barker; M Kamara, J Whitley, N McKoy, K Cooper; S Thompson, M Chopra. Subs: N Alexander (gk), G Loovens, P Parry, J Ledley, S McPhail, A Ferretti, K McNaughton, R Scimeca, J Easter.
External match reports
IC Wales
Cardiff City Official Website