John Kuntz, cleveland.com photo

CLEVELAND, Ohio — Except for the year Tristan Thompson switched to shooting right-handed, he has never shot this well from the free-throw line in his six-year career.

While this season brought some of his worst free-throw shooting (49.8 percent in the regular season), he has adjusted.

Hack Thompson?

Pay for it in these playoffs.

Thompson is shooting 66.7 percent from the line in the playoffs. Some of the credit can go to Kyle Korver, who began giving Thompson tips upon arrival from Atlanta. One of the biggest differences Thompson said as the instruction began was to focus on his trajectory; get more of an arc on his shot.

Here is a look at the evolution of Thompson’s free-throw shooting.

By Matt Goul, cleveland.com

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2011-12 season: Rookie learning curve

Entering the league as a lefty, free-throw shooting wasn’t all Thompson still had to learn. He shot a career-worst 43.9 percent from the field. His free-throw shooting was better.

What he shot: 55.2 percent, 106-of-192

Where he ranked among Cavaliers: 15th

For a trip down memory lane, here is what Thompson looked like as a lefty. Many of his jump shots drive straight toward the rim without much arc to them. For his free throws, skip to the 1:13 mark.

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2013-14 season: Left to right

What he shot: 69.3 percent, 235-of-339

Where he ranked among Cavaliers: 12th

What do Dion Waiters, Anderson Varejao and Anthony Bennett have in common? They all shot worse than Thompson this season, as he famously switched from his left to right hand.

Thompson's bio on basketball-reference.com even crosses out "left" and adds right for his shooting hand.

His ranking during the 2013-14 season is more like 10th if you take away Sergey Karasev (9-of-10) and Carrick Felix (3-of-4) for too few attempts.

A sample of Thompson's first season shooting right-handed can be seen below. He takes a free-throw attempt at the five-second mark.

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2015-16 season: A downward pattern

Fast forward to last season, and Thompson's free-throw shooting continued a downward pattern. His 69.3 percent effort after changing hands was followed by 64.1 percent and this.

What he shot: 61.6 percent, 149-of-242

Where he ranked among Cavaliers: 15th

Only Sasha Kaun (5-of-11) shot worse from the line this season.

And Kyle Korver wasn't the first guard to try and help. Matthew Dellavedova lent a hand, as seen below in January 2016. In this clip, Thompson appears to get some arc on his shot, so repetition remained a challenge.

Matthew Dellavedova helping Tristan Thompson work on his free throws. #Cavs pic.twitter.com/IQ36kHFYJe — Spencer Davies (@SpinDavies) January 1, 2016

2016 playoffs: The struggle continues

Thompson's deteriorating free-throw accuracy continued in the Cavaliers' championship run.

What he shot: 57.5 percent, 42-of-73

Where he ranked among Cavaliers: 11th

If there is a positive to the 57 percent, it’s that he shot better than marksman James Jones, who was just 1-of-4 in the playoffs.

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2016-17 regular season: Paging Kyle Korver

Even Thompson admitted during his struggles this season that repetition mattered.

"Think I just got to get back to the basics and stick with the routine and follow through with it, stick with the same routine," he said in January. "For me I'm going to keep working. You guys know I'm going to work my ass off."

What he shot: 49.8 percent, 106-of-213

Where he ranked among Cavaliers: 19th

To put his career-worst shooting into perspective with the rest of the team, only Edy Tavarez shot worse: 0-of-1 in his only appearance, the regular-season finale.

Here is what Thompson's free-throw shooting looked like in November:

Lebron James with the put back dunk after Tristan Thompson misses free throw! pic.twitter.com/e5aEri5n70 — The Fuzz (@TheFuzzNBA) November 27, 2016

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2017 playoffs: Into form

What he's shooting: 66.7 percent, 36-of-54

Where he ranks among Cavaliers: Ninth

Think his 2014 improvement from changing hands was remarkable? Thompson has been a more reliable free-throw shooter in 13 playoffs games than J.R. Smith and Richard Jefferson.

Bump him up to fifth if you remove players with fewer than 10 free throws this postseason (Kyle Korver, Dahntay Jones, Iman Shumpert and Channing Frye).

Here is how it looked by Game 1 of the Eastern Conference finals. Skip to the 20-second mark to see his free throws.

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