A well-matched field of 14 is expected to go to the post tomorrow in the 26th running of the $100,000-added John B. Campbell Handicap at Bowie over 1 1/4 miles.

High-weight and probable favorite is Eldorado Stable's Pole Position, assigned 126 pounds by the racing secretry, Larry Abbundi. Pole Position has won three Bowie allowance races and the Native Dancer Handicap. The chestnut will try to emulate Kelso, Mongo and last year's victor, Mister Brea, successful high-weight winners of past Campbells. The 4-year-old winner of more than $300,000 will again be ridden by Gunnar Lindberg.

Competition should come from T.V. Hill and the Frank Martin-trained entry of Identical and Ring Of Truth.

The Martin entry has been racing successfully at Aqueduct, with Identical taking the Stymie Handicap and Ring Of Truth a head back. Identical has been assigned 116 pounds, his stablemate 114, Jockey Walter Guerra has been named on both horses overnight.

T.V. Hill, a $6,100 bargain as a weanling has won 10 races and boasts earnings of almost $200,000. The son of T.V. Commercial lost by a nose to Pole Position in a prep race last week and the Campbell's added eighth of a mile will enhance his chances for an upset.

Trainer Julius Tuminelli, a 64-year-old veteran of Maryland racing, said of T.V. Hill, "He needs everything his own way. He's like a club fighter fighting a classier opponent. Even the wind could be a factor if he is to win."

Veteran jockey Jack Kurtz will again pilot T.V. Hill, burdened with 114 pounds.

The Campbell, which once attracted the finest thoroughbreds in training, was named for the late racing secretary and handicapper who never flinched when assigning weights to the class horses of well-known stables. Campbell is generally considered the yardstick by which U.S. racing secretaries are judged.

Of the longshots, Charlie Coast and Telly Hill have the best chances at the top part of the $116,800 purse.