He could in his, admittedly short, prime from 26 to 28. He hit .305, .283, and .270. League average BA those years was .252, .245, and .244.
Standard deviation on BA is about 0.20, so each 0.20 above average is ten points on the scouting scale.
So for those three years Alberto's hit tool was roughly a 75, a 70, and a 60.
But he wasn't valuable in two out of three of those years because he didn't do anything else well.