Didn’t they just sign him?
They did, but they gave him a one year deal making him a UFA at it's expiry without much of a fight, given how the fanbase treats him he appears to be a very divisive figure and it seems the sentiment is shared within the organization. Kind of reminds me how we gave Petry a 1 year deal leading him into free agency and he took that personally and wouldn't extend with us, even after management admitted they $*%#ed up not offering him a proper contract with term.
There also appears to be very little hard consensus around their d-core. Obviously Dahlin and Power are the pillars of their group holding down the 1st and 2nd pair and most have Clifton holding down the 3rd pair, Byram, Jokiharju, and Samuelsson are tossed around pretty interchangeably.
The arrangement I see most is:
Dahlin (L) - Samuelsson (L)
Power (L) - Jokiharju (R)
Byram (L) - Clifton (R)
With many wanting to get Byram more minutes and he seems better liked than Jokiharju, I think the driving factor is they are trying to avoid the weirdness of 4 LHD in the top 4 and 2 RHD in the bottom 2.
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Unrelated to Jokiharju Chris Johnston apparently said the Leafs are open to trading Liljegren despite just extending him, sound like they want someone better, older, and making the same or less money; I don't think we have the pieces to get in on that deal without it being a 3-way trade, but I'm kind of interested TOR has such a bad habit of trading guys right before they break out.