Complex sentence: In that year white sleeves were added to the previously all-red shirt and blue hoops were also introduced to the socks, which he thought would make it easier for his players to pick each other out on the field of play.
Split into simpler sentences: In that year white sleeves were added to the previously all-red shirt and blue hoops were also introduced to the socks. Making it easier for his players to pick each other out on the field of play.