COWBOY ELLIOTT TRIES TO GET PAL SELLECK BACK ON THE HORSE

OLD pards Tom Selleck and Sam Elliott have a rock-solid friendship dating back decades, and now insiders say the lanky 1883 star is hustling to reconnect with the brooding Blue Bloods lug and snap him out of his current funk.

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Tom Selleck is about 100 pounds heavier than in his '80s heyday, observers say

The 80-year-old Selleck has reportedly been down in the dumps since the 14-year run of his TV cops drama Blue Bloods, where he played Big Apple Police Commissioner Frank Reagan, ended in December, and Sam, 81, hopes to snap his old pal back.