[MLS TRANSACTIONS] The Vancouver Whitecaps continued to rebuild their backline, signing 6-foot-3 Argentine center back MartinBonjour, who most recently played in Uruguay for Rampla Juniors. The ‘Caps earlier signed South Korean right back Lee Young-Pyo. Meanwhile, the ColumbusCrew has brought in 26-year-old forward Olman Vargas from Herediano. For all the offseason player movement …

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