Ron Gardenhire was at Comerica Park on Tuesday afternoon. The former longtime Minnesota Twins manager, who opposed the Detroit Tigers for 13 years in the American League Central Division, was in Detroit interviewing with general manager Al Avila for the team’s managerial opening, according to a person with knowledge of the situation. Gardenhire, 59, is the most accomplished managerial candidate on the market. In 13 seasons with the Twins, he won six AL Central championships. He is among the most well-respected managers in the game and is considered a safe bet in any scenario — whether with a rebuilding team or a win-now team.