Gedunker is right, one player doesn't make that big of a difference, but Pudge is the best. Steve Carlton won 25 plus games a year for a Phillies team that only won 70 games a year. I think he did this for 3 consecutive years in the middle 1970's. HOFer on a crappy team.
The one nice thing about baseball, is that even if your team has a sucky season, there are streaks that can get you really stoked. Lightning in a bottle. 2 out lightning. Whatever you want to call it. I'm not kidding when I say that Baseball mirror life and is for me a religion. More fail than succeed and individuals who succeed only do so 3 out of every 10 times. Despite what coaches like to say, "never get too high or too low", the season is filled with peaks and valleys that provide an emotional roller coaster.
I could go on for hours about the physical and emotional beauty of baseball. Unfortunately, most people are in too much of a hurry to understand and feel it.