i have no interest in albert pujols or this bat. the rules were not changed to -3 until after pujols was done playing in high school. perhaps before you judge someone or an item you should do even the slightest research. i have seen this bat at auction before with a known auction house. not sure how much it sold for then.
I'm mostly an autograph guy but have had my share of exposure to game used stuff. I grew up pretty close to where Pujols played his high school and college ball. While I can't say that I saw him play much I do remember hearing the story about the cracked bat homerun. Whether or not this is the bat from that game, I have no idea. The difficulties of authenticating this bat would be the same as doing any amateur bat. The bats aren't custom ordered so you can't check the records. You would need 1 of at least 3 things. Confirmation from the player, background from a team mate/coach, or a picture of him using the bat. I can attest to one thing, the Pujols autograph is certainly from his high school or college days. He made recognizable changes over time making his autographs fairly easy to date. This one is definitely from the 1990s, before his pro days. PSA/DNA knows their early Pujols signatures and they authenticated it. As is usually the case with game used stuff, it's pretty difficult to prove what was actually used, especially at the community college level.