Schwartz, 29, parlayed a fantastic 2013 in Kansas City into a four-year, $16.8 million deal with the Giants in 2014. However, a broken toe and broken leg in consecutive seasons limited his game time to just 13 starts in two seasons.
The one-year deal seems to be fairly risk-averse for the Lions and a good opportunity for Schwartz to build his price for free agency next year. Currently, the Lions are starting first-round pick Laken Tomlinson at one guard spot with Larry Warford slated at the other -- all five starters from a disappointing 2015 unit have returned.
If nothing else, Schwartz will provide a quality veteran presence. His attitude and leadership in New York's locker room were not forgotten by the club over two difficult seasons and a good deal of turnover.
Here are other transactions that went down on Wednesday: