Under Armour Kids - Rival Terry Shorts (Big Kids). Color Black/Castlerock. On sale for $20.97. MSRP $30.00.. 5.0 out of 5 stars+3Brand NameUnder Armour KidsProduct NameRival Terry Shorts (Big Kids)ColorBlack/CastlerockPrice$20.97MSRP: $30.00Rating5Rated 5 stars out of 5(2)