Jenkins delivers in a pinch to cap sizzling road trip at plate

SAN FRANCISCO — It was far too early to worry, but, well, it didn’t feel great. Following a sensational start to his big league career, Walker Jenkins promptly fell into his first slump in the Majors. He boarded a flight to California last week sporting a batting average that started with a zero. That’s the good thing about small sample sizes, though: they can turn quickly. A week later, Jenkins heads back to Minnesota as one of the hottest players in the American League, riding a seven-game hitting streak and seeing much better numbers next to his name on the…