Entering the 2022 season, the A’s had only a handful of veteran players with a track record of major league success. One of those players, reliever Lou Trivino, has taken a significant step backward. For the second time in three days, Trivino gave up the go-ahead run in a crushing loss as the A’s losing skid reached nine games with an 8-4 defeat to the Cleveland Guardians. After allowing a go-ahead homer to light-hitting Braves outfielder Guillermo Heredia on Tuesday, Trivino entered a tie game in the eighth inning on Thursday in Cleveland and gave up five straight hits while costing Oakland a…