Dave Collins is the Triceratops Jurassic Ranger and later the Stegosaurus Alpha Jurassic Ranger portrayed by Oren Williams.
"The cocky and confrontational teen whose abrasive nature is just a cover for the envy he feels for his older sister who his parents adored and left Dave to wallow in the shadows feeling alone. He is in a complicated relationship with Billy which hasn't stopped him from seeing the other cheerleaders like the typical narcissistic football player."