There's some voodoo to focusing on injury history in acquiring players.
Salo was brought in with a horrid injury history at the price of a promising top 6 forward, and despite continuing to get injured, turned out to be one of the Canucks' greatest home runs in terms of acquisitions.
Ballard and Sutter were brought in with zero injury history, then suddenly fell apart as soon as they hit the ice.
Eriksson came in with a recent injury history, then his play fell off a cliff for seemingly unrelated reasons.
I had no issue with the Ferland acquisition. At the time, most considered his contract to be well worth it, factoring in the injury risk. Nothing about his injury history was suggestive of him being unable to play even half a season after being acquired. His history was of a player who, despite playing a physical game and suffering injuries, was able to play 71+ games every season since he first became a full time player. Injury related decline was a risk, but the expectation was that even with decline he would likely provide value at $3.5M.