[1] A native of Charlotte Amalie, United States Virgin Islands, Hendricks was selected by the Baltimore Orioles from the California Angels in the Rule 5 draft on November 28, 1967.

[2] He was a superior defensive catcher and a very fine handler of pitchers on a usually strong Orioles rotation that included Mike Cuellar, Pat Dobson, Dave McNally, Jim Palmer and Tom Phoebus.

But center fielder Tommie Agee, who was playing the left-handed Hendricks to pull in right-center, chased down the ball on a dead sprint, extending his left arm for a backhanded over-the-shoulder catch in the webbing of his glove.

He was involved in the most controversial play of the 1970 World Series when the Cincinnati Reds were batting against the Orioles with one out and the score tied at three in the sixth inning of Game 1.

With his back to the play and after being knocked down, Burkhart ruled Carbo out even though Hendricks made the tag with his mitt while holding the ball in his bare hand.

[6] Hendricks made the only pitching appearance in his MLB playing career in a 24–10 loss to the Toronto Blue Jays at Exhibition Stadium on June 26, 1978.

[7] In 711 games played, including 658 with Baltimore, Hendricks was a .220 hitter with 62 home runs (still the all-time record for a United States Virgin Islands native) and 230 RBI.

After his stroke, Hendricks was reassigned to another position within the organization, one that would enable the club to take advantage of his huge popularity within the Baltimore community; along with his loyalty to the "Oriole Way" and to the traditions of baseball, he was a tireless signer of pre-game autographs and a general good-will ambassador.