After my freshman year in college baseball, I am not in a league this summer so I can focus solely on retooling my mechanics. I am planning on throwing two bullpens a week plus 2 or 3 more days a week throwing and/or a bit of long toss. I have from now until late August when fall baseball starts. Would you recommend me lifting on an off-season schedule to build more functional strength or an in-season schedule for the summer so I can be more fresh for my throwing and drills?
Also, what is the difference between in- and off-season lifting other than less in quantity? Is it the reps or sets? Should you not try to progress towards higher weights?