[1] During his playing days, he stood 6 feet 3 inches (1.91 m) tall, weighing 200 pounds (91 kg).

Recalled from the minor leagues by Kansas City in September 1971, he appeared in three games, two as a starting pitcher, in the season's final weeks — and won all three of them.

In 1972, Montgomery started and finished the season in the big leagues, while playing most of the campaign for the Triple-A Omaha Royals.

However, on September 7, 1972, he threw his only MLB complete game shutout, a four-hit, 6–0 blanking of the California Angels at Municipal Stadium.

[2] Altogether, in Montgomery’s brief major league career, he logged 12 games (ten of them as a starter), and won six of nine decisions, allowing 71 hits, and 20 bases on balls, with 36 strikeouts, in 772⁄3 innings pitched.