Corona baseball has a new ace, junior left-hander Mason Sims
Waiting patiently as he watched Ethan Schiefelbein, then Seth Hernandez perform as ace pitchers for Corona, junior left-hander Mason Sims has now assumed that role — and what a performance he turned in Monday during a Big VIII League game. Sims struck out 12 with no walks in six innings of Corona’s 3-0 win over…