Zakuani said: "I've done my research and he is a perfect fit for the type of player I'd like at the club. A talented addition who has proven himself already at this level and his hardworking attitude will see him fit into the club right away."
Macleod added: "I know people at the club and I am well aware of what's developing here at Spalding United and I am very keen to be a part of it. It's the right move for me and I cannot wait to get started."
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