As you are all aware, the latest Cub rumors are about the possible acquisition of Randy Johnson, The Big Unit. Johnson is 5 wins shy of 300 and 211 strikeouts shy of 5,000. He's also undefeated at Wrigley Field and, earlier in 2008, his season basically turned around after he drubbed the Cubs on July 21. Before that date, he'd been 6-7 with a 4.89 ERA. After that date, he went 5-3 with an ERA of 2.16, and it all started with an easy victory against the Cubs in Arizona.
In the long history of the Cubs organization, the team has acquired Cub Killers fairly often, and usually once they come to the North Side they see their success and production level off. The obvious reason why is because they no longer have the Cubs to pad their stats against. Like Adam Dunn, Randy Johnson is a legendary Cubs killer who probably will not have the same level of success as a Cub.
Actually, write that down. Johnson will not have a spectacular 2009. Chances are that, at 46 next year and with a history of back and knee problems, he'll be inconsistent at best and will likely be mediocre. Don't get me wrong, I'd expect him to still put up numbers that compete with those of Jason Marquis, but considering that he'd probably make as much or more money as Marquis, and considering that he'd be essentially replacing Ryan Dempster in the rotation, then it seems fair to say that the Cubs would be stepping sideways - if not backwards - in signing the Unit.
Hopefully the Cubs make it a moot point by acquiring Peavy, although that seems to remain a long shot. Or maybe they will moot it by bringing back Dempster, although that also seems unlikely. But Randy Johnson as a Cub will not be what this team needs to win, of that I feel certain.
And I'm already missing Kerry Wood.