Scott Baker has never met Derrick Rose. But even 2,000 miles away, the Cubs pitcher can see that he and the Bulls superstar are sort of Chicago sports brothers in arms these days — well, rehab brothers in elbows and knees, anyway.

‘‘It can be really hard,’’ Baker said. ‘‘To perform at a certain level at 100 percent and then to not feel 100 percent, it’s sometimes difficult to realize you can still be effective — I guess, from a pitching standpoint — that you can still be a good, competitive pitcher [at less than] 100 percent.’’