I box more as a pressure fighter, would throwing wrestling and weightlifting into my current training routine help me out? I know Jim Jeffries wrestled in his training camps, but im not sure if that was only during his bare knuckle era. Any feedback helps, thanks!
It won't improve your boxing ability obviously, but the extra athleticism, power and strength might come in handy. give it a try unless you have a fight in the next month!
If you can fit it in, then certainly. Wrestling is great fun and it utilizes the same concepts of range and angles as boxing in many ways. I don't think it will help you technically, if you're main goal is boxing, but you will gain significant strength and muscle endurance from wrestling and lifting weights.
Cross training in other sports certainly wouldn't hurt unless it cuts into your boxing training. I bet it'll help you a lot if you're the type who relies on punching off the clinch.