Chase Powers is first introduced in Season 3 during the episode Ring of Fire. He comes off as arrogant and desperate to win the Ring of Fire competition, but is shown to actually be very good with horses. He seemed to take an interest in Amy and throughout seasons, he flirted with Amy and once they kissed, but Amy did not reciprocate his feelings as she was just caught up in the moment. Amy did mention to Ty in the fourth season finale that she had a small crush on Chase.
In season 6, Chase has a wife and visits Amy. He still, although, continues his flirting with Amy. He kissed her saying he still had feelings for her and he was the one who hadn't moved on, she slapped him and told him never to do that again. He is very embarrassed and leaves immediately. This time Amy tells Ty that she does not like him AT ALL. Chase never comes back after this. He is a manipulative liar who gets what he wants.