The Chicago Cubs secured some potential bullpen help ahead of Sunday's series sweep over the Arizona Diamondbacks, While Daniel Palencia finally returned to the active roster this weekend, the team's pitching depth remains thin. Several starters and relief arms remain stuck on the IL, forcing Chicago to shuffle seats in the clubhouse plenty over the last couple of weeks. To be sure, they have impressively avoided allowing this to impact their results, as they are now 15-3 in their last 18 games. But the NL Central remains as close as any division in baseball. Holding onto the top spot isn't going to be easy, and it's likely only a matter of time before the bullpen troubles finally do rear their ugly head. With that in mind, do not be surprised if the Cubs continue to look for possible solutions . Their latest attempt is Luis Peralta, who they snagged off waivers from the St. Louis Cardinals. The lefty only joined the Cubs' division rival last week after the Rockies put him on waivers. Nonetheless, St.…