Karlsen Termini pitched seven innings for Prep (6-15, 3-8), allowing three earned runs and striking out seven.
He was backed by a big day from Alex Sierra, who went four for four with two doubles, a triple, two runs batted in and three runs scored.
Harvard-Westlake 7, St. Francis 2: The Golden Knights dropped their 10th consecutive contest, this time falling on the road Friday afternoon in Mission League play.
Junior outfielder Cole Ramseyer finished three for three for St. Francis (7-19, 2-8) with a double, a RBI and a run scored. Ramseyer was driven in by P.J. Dezotell on a bunt single as the Golden Knights only trailed 3-2 heading into the fifth.
La Cañada 5, San Marino 3: The Spartans held off another late Titans rally at home Thursday for a two-run win after San Marino scored twice in the top of the seventh.
La Cañada's five-run third was enough for the victory, as the Spartans improved to 10-12, 2-8 in league after a 1-0 loss on the road to Temple City Wednesday.
Prep League Individual Tournament: Jack Bouchard of Flintridge Prep finished second for the third season in a row at the event. Bouchard, a junior, carded a one-under-par 70 on Thursday at Brookside Golf Course No. 1 in Pasadena and finished with a two-round score of 146. Bouchard will next compete in the CIF Southern Section Individual Tournament, which will be held May 14 at Las Posas Country Club in Camarillo.
"He's proven to be a good player and he had two solid rounds," Flintridge Prep Coach Bob Loughrie said. "He's an excellent player."
Alex Angard of Viewpoint shot a 69 on Thursday and finished with a two-round tally of 140 to repeat as league champion.
St. Francis in Mission League Individual Tournament: Johnny Brandt of St. Francis recorded an even-par 72 in the event Wednesday at Wilson-Harding Golf Course at Griffith Park.