LOS ANGELES—Anthony Davis had 34 points and 15 rebounds to help the Los Angeles Lakers beat the San Antonio Spurs 114–106 on Sunday. Talen Horton-Tucker scored 17 points in his season debut for the Lakers, and Carmelo Anthony and Wayne Ellington each had 15 points. Los Angeles led by 14 points in the second half, then held on improve to 3–3 since LeBron James was sidelined Nov. 4 because of an abdominal strain. The Lakers have won four overall games this season without James, one a 125–121 overtime victory in San Antonio on Oct. 26. Davis had the big game two days after the Lakers were humbled by 24 points in a home loss to Minnesota, with the All-Star forward saying afterward the performance was “embarrassing” and that the team lacked effort in a deciding third quarter. His effort Sunday was a concerted effort to lead by example. “I wanted …