Johnson, who originally came up with the Athletics (when they were in Kansas City) back in 1960 as a 24-year-old, hit .174 in those last 30 games in 1970, with eight hits over 46 at-bats with six runs scored and two runs batted in.
His best season was 1962 when, with the Washington Senators, he hit .288 in what turned out to be his only full-season of play, appearing in 135 games and collecting 134 hits over 466 at-bats and 504 plate appearances.
In all his other Big League seasons he never even had 300 plate appearances or 100 games played, averaging about 75 games a year.
By the time he retired, he finished with a very nice .272 batting average, with 628 hits in 2307 at-bats in 874 games, playing for seven different teams and five different positions.
Not a bad “under-the-radar” MLB tenure.