In this interlocutory appeal, Arkansas inmate Leroy McCoy, a/k/a Malik A. Khabie, appeals the district court’s 1 final order granting summary judgment to defendant Max Mobley, the Arkansas Department of Correction Deputy Director. In McCoy’s 42 U.S.C. § 1983 complaint, he based his claim against Mobley, who is not a healthcare professional, on Mobley’s responses, or lack thereof, to McCoy’s grievances and letters about the allegedly inadequate medical care he was receiving. Having carefully reviewed the record, see Jolly v. Knudsen, 205 F.3d 1094, 1096 (8th Cir. 2000) (standard of review), we affirm.

We agree with the district court that McCoy failed to create a triable issue regarding his claim against Mobley. He offered nothing showing that Mobley was personally involved in his care, or that he facilitated, condoned, or ignored a known Eighth Amendment violation by prison medical staff. See Meloy v. Bachmeier, 302 F.3d 845, 849 (8th Cir. 2002) (supervisory liability under § 1983; prison medical director who lacks medical expertise cannot be liable for treating staffs diagnostic decisions, and prison officials cannot substitute their judgment for medical professional’s prescription); Jolly, 205 F.3d at 1096 (for Eighth Amendment violation, inmate must show he had objectively serious medical need which prison officials knew of and deliberately ignored); Moody v. St. Charles County, 23 F.3d 1410, 1412 (8th Cir. 1994) (to defeat summary judgment, party must substantiate allegations with sufficient probative evidence that would allow finding in his favor on more than mere speculation).

Accordingly, we affirm. See 8th Cir. R. 47B.