Alvarez’s latest rehab start inspires excitement On Saturday, Henderson Alvarez’s second rehab start at Class A Stockton included one hit, one run and four strikeouts in four innings. [...] Alvarez debut with the A’s isn’t imminent - he will have at least two more rehab starts - but all indications are positive after the 2014 All-Star with Miami underwent shoulder surgery July 28. On Thursday, in his next rehab start, the plan is for Alvarez to throw five innings with a pitch limit of 75. Melvin didn’t have an update on starter Chris Bassitt, who has a partially torn ulnar collateral ligament that could require Tommy John surgery. On Wednesday, the Michigan football coach, who doubles as Melvin’s friend, hung out with the team in the four hours before their game against the Tigers. Harbaugh was the A’s first-base coach during a spring-training game in 2015.