There is a best of the worst, and then there is the worst of the worst.
Marlon Byrd is not, mathematically, the worst of the worst. Spoiler warning: Ryan Kalish and Ryan Lavarnway managed to rack up an impressive -2.8 WAR between them. Now that's impressive!
However, Ryan Kalish and Ryan Lavarnway also have some mitigating points. They did not come at a price, and perhaps more importantly, they are both young with the potential to have a future impact on the team. Oh, and they weren't busted for steroids in June.
Frankly, though, the steroids could be considered a mark in Byrd's favor. After all, when most players leave the team, they don't provide a laugh a few weeks later. No, it wasn't the kind of laugh you might get from a really good joke, but when you put together the steroids with Byrd's performance in Boston, you can either laugh at the absurdity of it, or go a little deeper and feel bad about the story of an aging baseball player trying to keep his career alive with PEDs.
I'll take the laugh, but that's just me.
Anyways, baseball. Or some pale imitation of it at least. After outfielder after outfielder went down to injury, the Red Sox turned to Chicago and traded for Marlon Byrd. A truly terrible .070/.149/.070 start to the season did not drive the desperate Sox away, hoping that he could find some of the stuff that made him a decent option over the last few years.
No such luck. Hard as it might be to remember (believe?) the former Cub managed a six-game hitting streak to start his time with the Sox, putting up eight hits in 24 at bats. It only came with one walk, and all eight were singles, but beggars can't be choosers when it comes to production.
The average didn't last long, however, with a .246 mark in May bringing the whole show to a halt. By the time June came around it was game over for Byrd in Boston; the Sox found better options and let Byrd go to bring in Daisuke Matsuzaka from the disabled list.
Oh, wait, did I say Byrd was the worst of the worst? I forgot Daisuke! Peripherals or no, an 8.28 ERA is an 8.28 ERA. Congratulations, Marlon Byrd! You've been promoted to lasting joke status.