A second opinion confirmed the original diagnosis of Miguel Montero's sprained left thumb.
Cubs placed C Miguel Montero on the 15-day disabled list, retroactive to July 12, with a sprained left thumb.
According to MLB.com's Jonathan Mayo, Miguel Montero (thumb) could be out for as long as six weeks.
Miguel Montero (thumb) will be placed on the 15-day disabled list on Friday.
The Cubs will re-evaluate Miguel Montero (thumb) over the All-Star break before deciding whether to place him on the disabled list.
Miguel Montero underwent an MRI on his ailing left thumb Saturday.
Miguel Montero left Saturday's game with a jammed left thumb.
Miguel Montero left Saturday's game against the White Sox with an undisclosed injury.
Miguel Montero is not in the Cubs' lineup Friday.
Miguel Montero went 2-for-5 with a two-run homer in Thursday afternoon's win over the Mets.
Miguel Montero is not in the Cubs' lineup Monday.
Miguel Montero (back) returned to the Cubs' starting lineup Thursday against the Indians.
Miguel Montero was scratched from the Cubs' starting lineup Wednesday with back stiffness.
Miguel Montero was ejected from Tuesday's game against the Indians for arguing balls and strikes.