First time poster, long time lurker.
Some White Sox fans obsessions with bad baseball players has always baffled me. Comparing Daniel Palka to Joc Pederson is just laughably absurd. Palka is 27 years old and Pederson is 26. Despite Palka posting a +107 wRC last year, he was a .7 WAR player in nearly 500 at bats. He doesn't walk, he strikes out a ton, and he might be the worst defensive player in baseball. He graded out as a -12.1 last year despite playing the easiest position on the baseball diamond and playing a position that is cluttered with horrible fielders.
Joc on the other hand, is one year younger and has already accumulated 10.1 fWAR, with two seasons over 3.1 and one at 2.7. He's an above average MLB player. Joc didn't grade out great in the outfield last year, but in his career he's a career average CF'er - which is much harder to be than an average left fielder. ANYONE who thinks Daniel Palka can even sniff Pedersons jock as a defensive player is absolutely kidding themselves. Pederson's wRC+ last year was 126!, and in his one down year he was a league average hitter with an wRC+ of 100.
I get it guys, you had fun watching Palka on a very bad baseball team. He supplied you with some moments of joy in a season that had very few, and he seems like a fun good guy... but he SUCKS at baseball. He does not belong on any even mediocre baseball team. Joc, on the other hand, is an impact player on a Good baseball team. Even comparing the two players is absolutely laughable.
Daniel Palka does not belong in a MLB uniform. He has some power and can hit the ball really hard, but overall he's a bad baseball player. He can't play the field, he can't throw, he's a poor baserunner and his bat ceiling is a slightly above average hitter? No thanks.
Also, as a CF'er for 18 years of my life, people citing sprint speed is absurd. Aaron Rowand wasn't winning any sprint speed contests but he was a hell of an instinctual defender. I'm not comparing Pederson to Roward, but his sprint speed means very little. You're breaking down already unreliable defensive metrics even further - using catch probability on a year to year basis is a horrible way to analyze a player given the micro-nature that is the sample size.
Long story short, Daniel Palka is awful at baseball and Joc Pederson is not.