Thanks to MLB for this one. I got a "reward" for voting in the ASG final man vote, a free temporary subscription to MLB.TV. So I started searching for a couple photomatches. This bat first hit the market from a June-July 2010 auction hosted by Miguel Cabrera. I figured he personally acquired the bat from Billy in the early June Tigers at Royals series. So I started there and worked my way back to 5/31/2010 when I photomatched this bat to the at bat when it broke in the second inning. Photomatched it to the game before on 5/30/2010, and could tell it had a lot of previous use. So I went back to the most recent HR on 5/26/2010 and photomatched to that as well. So, looks like this bat was used for close to a week. The highlight being HR #5 of 2010, which was career HR #45.