Complex sentence: He made his debut for Scotland at that season's end and was selected in the squad for the 1954 FIFA World Cup in Switzerland, but Scotland lost to both Austria and Uruguay and exited the competition in the first round.
Split into simpler sentences: He made his debut for Scotland at that season's end and was selected in the squad for the 1954 FIFA World Cup in Switzerland. However, he couldn't prevent Scotland succumbing to both Austria and Uruguay and exiting the competition in the first round.