premise: The Other One is the third solo album by former Fleetwood Mac guitarist Bob Welch. The track "Future Games" was first released on the Fleetwood Mac album of the same name in 1971. Members of Welch's backing band also make songwriting contributions here though the majority of tracks are Welch's own.
hypothesis: Bob Welch wrote the song "Future Games".
reason: The context states that other members of the band contributed to songs, but does not say whether they did so on "Future Games", so we don't know if he was the sole writer or not.