The benifits are obsvious but if your doing it to help your game you are better off toning up not bulking up as too much muscle will hinder fast bowling but may help batting
To bulk up eat chicken best way lots of chicken and beef forget all these protein shakes and crap unless you can afford £100+ a month to do it right as my mate does
Do you want to bulk up or tone up then as bulk up high weight low reps tone up low weight high reps 
Don't have to spend £100+ a month on protein shakes. Most of the companies use the same formula, just slightly different tasting. Maximuscle are one of the most highly rated, I used them for a while because my gym gave me free stuff from them. However my housemate, who's a rugby leaguer, uses this stuff
http://www.predatornutrition.com/pd-syngex-5lb-free-predator-shaker.cfm it works for him, and if you take one a day, or 2 every day that you train, you get a good 1.5-2 months worth of it. £32 as well. However roco's right, bulking up means doing fewer reps of a higher amount.
It does have a decent impact on your game, more power, and more muscular endurance as well. It'll also have a psychological effect, if you notice you've gotten bigger you'll feel as though you can hit the ball harder, and probably will due to the psych. effects of it!