07/20/2020 - Official College Recruiting Membership - Stockton (Sacramento), CA Ruben is an athletic 2-way player (OF/LHP) who showed well on the diamond. As a hitter, this righty displays an open stance with centered balance and fluid rhythm to load. Quick hands fire the barrel to and through the zone with + bat speed. He swings against a firm front side, squares the ball up and has some pop to his pull-side. In the OF, he has active prep and a quick first step. He takes solid routes/angles to track down fly-balls, works into position behind the ball and gathers well with a quick/clean transfer to throw. On the mound, this lefty has an effective 3-pitch mix coming from a high 3/4 arm slot and free/clean arm action. He works to a controlled balance point, has smooth separation and repeats his delivery well. He commands his FB - ranging from 73-74 mph. Slider has tight spin and will be a good go to pitch. Changeup is thrown with FB arm speed, helping to create deception. He keeps it down in the zone which will result in GB outs. Rivera is a talented 2-way prospect who can make things happen in a variety of ways.