From kitchen gadgets to repair tools and supplements, these TV products come with disappointing tests, disputed claims, safety warnings, or extra costs.

Jim Nantz tried the “Peanut Punch” on J.J. Watt during CBS’ Bills-Raiders broadcast, but the NFL demonstration ended with Nantz reaching for an ice pack.

Say this for Tony Romo: he never put Jim Nantz in harm’s way. Nantz and new CBS broadcasting partner J.J. Watt were on the ...