LAS VEGAS – Maleyna Gregorio (T10) and Janna Andaya (T16) finished in the top 20 as UC Riverside finished play at the Big West Championship on Tuesday at Spanish Trail Country Club. HOW IT HAPPENED Gregorio shot a 75 (+3) to close out her sophomore campaign and was 1-under on the front nine thanks to three straight birdies before making the turn. Andaya rebounded from an 81 on Monday to close the Championship with a 74 (+2) in the final round of her impressive freshman campaign. Vanessa Betancourt posted birdies on four, eight and 11 on Tuesday to shoot a…