A stunning doubleheader sweep of College of San Mateo — the No. 1 ranked team in Northern California — ended the Bulldogs’ season Saturday.

No. 17 Los Medanos (27-16 overall) rebounded from Friday’s 18-0 walloping at the hands of CSM to score back-to-back victories of 3-1 and 5-4 Saturday at Bulldog Stadium, helped by five CSM errors on the day, to win the best-of-three series.

The Bulldogs (34-8) were riding a wave of momentum into the 10th inning of the doubleheader nightcap. After trailing 4-2 in the eighth, CSM was rejuvenated by a two-run double from Myles Coston. Deadlocked 4-4 in the 10th, however, Los Medanos capitalized on a hit, a wild pitch and two errors to push a run across on a squeeze bunt by Jason Kreske for the go-ahead run.

Sophomore right-hander Mark Quinby took the loss, yielding just one unearned run over three innings. It was his error that allowed the eventual winning run to score in the 10th.

It was a cruel finale for Quinby’s fine career through two years in Bulldog blue. He totaled 13 career saves and finished 2017 with 32 strikeouts through 21 innings pitched. While he did not log enough innings to qualify among the state leaders, his 13.71 strikeout-per-innings-pitched rate was better than that of Skyline sophomore Cole Watts’ state-leading 12.23 rate.

In Saturday’s opener, CSM held a 1-0 lead in the sixth when Los Medanos rallied to tie it. Then facing the CSM bullpen, the Mustangs took the lead in a two-run seventh. The Bulldogs committed two errors in the frame, including the play allowing Sawyer Olson to score the go-ahead run.

Skyline eliminated at Delta

No. 12 Skyline was swept in Stockton to be eliminated by No. 5 San Joaquin Delta in a best-of-three series. After falling 8-2 Friday, the Trojans yielded four runs in the first en route to a 10-3 loss Saturday.

Capuchino graduates took each of the losses. Sophomore right-hander Rory McDaid cruised through four innings Friday, but got tagged over his final two frames, allowing seven runs on nine hits through six. Then sophomore left-hander Joe Galea got roughed up for six runs on eight hits through three innings Saturday.

CSM softball advances

The No. 1-seed Lady Bulldogs (33-6) continued their shutout dominance over Yuba College, finishing the best-of-three regional softball playoff series Saturday with a 14-0 win. CSM won Friday’s opener 10-0.

Morgan Jones and Samantha Dean combined on Saturday’s five-inning, mercy-rule shutout. Dean, Meagan Wells and Jordan Davis all homered. Davis’ third-inning blast was a grand slam.

CSM advances to Super Regional play beginning Friday.