Baseball stats...whats good?

The goal is to have an ERA as close to 0 as possible. Anything under 1 is fantastic, under 2 is great, under 3 is good, under 4 is acceptable, etc. A batting average over .300 is usually considered good.

What Ivan said.
Depends on the context and league as well.

To build on what Ivan and Lefteh said, typically you will see higher ERAs among American League pitchers because they don’t have the luxury of facing a pitcher every 9 batters, instead facing a designated hitter that usually bat fairly well, taxing the pitcher more.

Pitchers are also held to lower batting standards than other position players because it is understood that they must focus on their pitching skills rather than their batting. For example, a .200 batting average would be considered quite good for a pitcher, while if a player of another position had a .200 it would be considered mediocre.

ERA
Good: Zack Greinke
Bad: Chien-Ming Wang

AVG
Good: Kevin Youkilis
Bad: David Ortiz

@simone54 Kevin Youkilis is my favorite player for the Red Sox! You get uber brownie points for bringing him up :)

@bright_eyes00 Ehhh, he’s the MLB Leader, is all. I hate Boston.

Theres something about Youkilis’s face that makes me want to hit him with a bat until he stops moving.

There’s something about Youkilis that just makes me want to have a beer with him.

@PrancingUrchin Is that what we do when we have a man-crush?

@simone54 I suppose. But it definitely isn’t my only man-crush on the team. It’s just something my girlfriend has to deal with. :)

Anything the Toronto Blue Jays are doing.
Look at them and try and duplicate it.