EUGENE — Jeff Gold turned in another strong performance on the mound to lead No. 15-ranked Oregon to a 4-1 win over Cal State Northridge on Tuesday at PK Park. Gold held the Matadors (5-8) to just one unearned run on six hits over seven innings. He struck out six while lowering his ERA to just 0.51. The junior from Moraga, Calif., has struck out 15 hitters in 17 2/3 innings while walking just two this season. Cal State Northridge took an early 1-0 lead against Gold on an unearned run in the top of the third. Anthony Lombardo delivered …