Grace, a former Diamondbacks player and broadcaster, was charged with four counts of aggravated DUI that could have resulted in a three-year prison sentence.

Is he gunning for most DUIs in a decade?

Hm. Probably a good idea to plead it out, considering that his defense would probably have been along the lines of: "Your Honor, have you seen some of the slumpbuster chicks I bring home? Gotta have some beer goggles for that, and taxis just aren't around in Phoenix like they were in Chicago."

If you google "slumpbuster", google gives you the response for Mark Grace.

I just want to know how in the hell you get charged with FOUR counts of aggravated DUI in one traffic stop.

An anonymous source told the court reporter that it was all Sammy Sosa's fault.

I just want to know how in the hell you get charged with FOUR counts of aggravated DUI in one traffic stop.

Guessing here (I don't know AZ law, just CA law) -
1. DUI with suspended license.
2. DUI without court-ordered interlock device.
3. DUI second / third / etc. offense within prescribed period.
4. DUI with "endangerment" (maybe he had a kid in the car? In CA this is a DUI enhancement, but might be an independent charge in AZ)

That's all I got.
I suspect that, although you could be convicted of all four based on one incident, you could only be punished for one - because you only did one criminal act. For example, ordinary everyday non-Mark-Grace DUIs are typically charged as both being "under the influence" and "over .08 BAC." But even if convicted of both, you can only be sentenced for one, because the act (drinking + driving) was identical.
Criminal law is weird sometimes.

So IOW, all but one charge is bogus, since they can't sentence you twice. All they are doing is upping their odds of getting a conviction with all the extra charges.

Can you slump bust your way out of prison?

So IOW, all but one charge is bogus, since they can't sentence you twice. All they are doing is upping their odds of getting a conviction with all the extra charges.

And if you're going to fight them, you have to be ready to fight all of them.
Welcome to my life.

It doesn't sound like they give you much of a chance at conducting a defense, so why bother?

Because sometimes they're wrong, and sometimes you gotta, and sometimes it's both.

Fun fact: Mark Grace was the only heterosexual position player picked in the 24th round of the 1985 draft to make the major leagues.