The Oakland Athletics made several additions to their active roster today, in lieu of transferring starting pitchers Jesse Hahn and A.J. Griffin to the 60-day disabled list on Tuesday. Along with Hahn and Griffin, right-handed pitcher Angel Castro was designed for assignment. Due to the roster expansion on September 1, it appears very likely that the A’s will promote several more players during the September call-up period. As always, Swingin’ A’s will have complete coverage and analysis in the next few days. Today, the Athletics adding eight players to their roster.