Has represented Czechia at numerous international tournaments, including the World Under-17 Hockey Challenge in 2012, IIHF Under-18 World Championship in 2013 and IIHF World Junior Championships in 2014 and 2015.

Played most of the season in Czech junior leagues, earning 16 points (9g, 7a) in 22 games with Pirati Chomutov’s junior team and tallying 26 points (10g, 16a) in 14 games with the under-18 squad… Ranked third in assists and tied for fourth in points on the under-18 team… Also skated in his first nine professional games with SK Kadan in the second-highest Czech pro league, recording three points (2g, 1a)… Played three playoff games with Chomutov’s junior team and scored one goal in four postseason appearances with Kadan.

Spent most of the season with Pirati Chomutov in the top Czech professional league, earning seven points (4g, 3a) in 37 games… Added four points (3g, 1a) in five games with SK Kadan in the second-highest league and tallied 15 points (5g, 10a) in seven games with Chomutov’s junior team… Registered three points (1g, 2a) in seven relegation playoff games as Pirati returned to the second league and posted two assists in his only junior playoff appearance.

Earned 21 points (7g, 14a) in 37 games with Pirati Chomutov in Czechia’s second-highest professional league and recorded eight points (1g, 7a) in three games with the junior team… Tallied 11 points (6g, 5a) in 11 playoff games as Chomutov again earned promotion to the top league, ranking tied for sixth on the team in postseason goals.

Played his first season in North America, registering 14 points (8g, 6a) in 25 American Hockey League (AHL) games with San Diego… Ranked fourth in goals and points among Gulls rookies… Made his AHL debut vs. Grand Rapids (10/10)… Tallied two points (1g, 1a), including his first AHL goal, in his second game vs. Bakersfield (10/16)… Recorded two points (1g, 1a) vs. Texas (2/17)… Posted a three-game point streak from 3/16-3/19 (2g, 1a), including his first AHL game-winning goal at Ontario (3/19)… Earned two points (1g, 1a) at Stockton (4/10)… Added four points (1g, 3a) in nine Calder Cup Playoff games… Made his AHL postseason debut in Game 1 at Texas (4/21) and posted three points (1g, 2a) in the next three games (4/23-4/29) to help the Gulls earn a first-round series victory.

Spent most of the season with Anaheim, recording 15 points (5g, 10a) in 53 NHL games… Led Ducks rookies in goals, assists and points… Ranked tied for seventh on the team in game-winning goals (2) and was one of three Anaheim skaters to score an overtime winner… Set his career highs in hits (42) and penalty minutes (18)… Also played 14 AHL games with San Diego, tallying 12 points (6g, 6a)… Began the season with San Diego… Tallied three points (2g, 1a), including two power-play goals, vs. Stockton (10/26)… Recalled to Anaheim and made his NHL debut vs. PIT (11/2)… Tallied an assist for his first NHL point vs. ARI (11/4)… Reassigned to San Diego and posted a three-game point streak from 11/11-11/18 (1g, 2a)… Recalled to Anaheim (11/19)… Scored the game-winning goal at VAN (12/1), the first goal of his NHL career… Posted two points (1g, 1a) vs. DET (1/4) and scored the overtime winner with 0:36 left in the extra frame vs. ARI (1/6)… Recorded two points (1g, 1a) vs. BOS (2/22)… Reassigned to San Diego and scored the game-winning goal at Tucson (4/1)… Recalled to Anaheim (4/5)… Scored two goals in nine NHL playoff games, making his Stanley Cup Playoff debut in the postseason opener vs. CGY (4/13)… Reassigned to San Diego and earned two points (1g, 1a) in the regular-season finale vs. Ontario (4/15)… Posted one assist in three AHL playoff games… Recalled to Anaheim (4/29)… Scored his first NHL playoff goal in Game 2 of the Western Conference Final vs. NSH (5/14) and lit the lamp again in Game 6 (5/22).

Tallied 38 points (20g, 18a) in 66 NHL games with Anaheim and played one AHL game with San Diego… Finished top-three among all Ducks skaters in goals, even-strength goals (19), game-winning goals (5) and plus/minus (+18) and was also top-five in points and even-strength points (35), setting single-season highs in all six of those categories… Was one of four Ducks skaters to score an overtime goal, accomplishing the feat for the second straight season… Ranked fifth on the team in takeaways (29)… Opened the season with five points (3g, 2a) in his first five games played (10/5-10/24), including a goal in the season opener vs. ARI (10/5) and his first NHL multi-goal game (2g) at PHI (10/24)… Missed three games due to an upper-body injury (10/11-10/15)… Suffered a concussion vs. LAK (11/7) and missed the next 10 games (11/9-11/29)… Posted a three-game goal/point streak from 12/19-12/23 (3g, 1a)… Reassigned to San Diego for one game (1/6)… Recalled to Anaheim (1/12)… Registered his first NHL three-point game (2g, 1a), including the game-winning goal, at LAK (1/13)… Posted a three-game assist/point streak from 1/17-1/21 (1g, 3a)… Recorded three points (1g, 2a) at CHI (2/15)… Scored back-to-back game-winning goals from 4/1-4/4, including his second career overtime winner vs. COL (4/1)… Skated in all four of Anaheim’s playoff games against SJS.

Earned 20 points (11g, 9a) in 30 NHL games with Anaheim… Ranked sixth on the team in goals, tied for fifth in even-strength goals (10) and tied for fourth in game-winning goals (2)… Finished third on the team in points per game (0.67) and seventh in takeaways per 60 minutes of ice time (1.91)… Recorded a point in 11 of 15 games from 11/18-12/18 (9g, 7a), never going more than one game without a point over that span… Tallied two power-play assists at WSH (12/2)… Posted back-to-back three-point games from 12/9-12/12 (4g, 2a), including his first career NHL hat trick (3g) vs. DAL (12/12)… Scored two goals vs. ARI (12/29)… Suffered a torn labrum at MIN (1/17) and missed the final 34 games of the season (1/19-4/5).

Registered 23 points (7g, 16a) in 49 NHL games with Anaheim and added one assist in six games with Boston… Ranked tied for sixth in points among Ducks skaters… Set his single-season highs in ice time per game (16:33) and takeaways (41)… Recorded two assists vs. SJS (10/5)… Suffered an upper-body injury at DAL (10/24) and missed five games (10/26-11/3)… Tallied two assists vs. DET (11/12)… Earned two points (1g, 1a) at FLA (11/21)… Scored two goals vs. CBJ (1/7)… Scored his first career NHL shorthanded goal at SJS (1/27)… Suffered an upper-body injury at TOR (2/7) and missed eight games (2/9-2/25)… Traded to Boston (2/21)… Posted an assist vs. TBL (3/7) for his first point with the Bruins… Added four assists in 11 playoff games… Missed the first two games in the bubble due to injury (8/2-8/5)… Tallied two assists in Game 4 of the First Round at CAR (8/17).

Skated in three NHL games with Boston, logging just 25:31 of ice time all season… Suffered an upper-body injury in his second game of the campaign at NJD (1/16) and missed the next 52 games (1/18-5/8)… Suffered an upper-body injury in his return to the lineup vs. NYI (5/10) and missed the regular-season finale and the entire postseason (5/11-6/9).

Completed his sixth NHL season… Recorded 27 points (14g, 13a) in 50 NHL games with Toronto, marking his highest goal and point totals since 2017-18… Ranked eighth on the team in goals and tied for fifth in power-play goals (4)… Established new single-season highs in power-play goals (4), power-play points (8) and blocked shots (32)… Posted a four-game point streak from 11/10-11/16 (3g, 1a), including a three-game goal streak from 11/10-11/13 (3a), tied for the longest of his career… Suffered an upper-body injury at LAK (11/24) and missed three games (11/26-12/1)… Posted a career-long, six-game point streak from 12/5-1/1 (3g, 5a), including a three-game assist streak from 12/11-1/1 (4a), tied for the longest of his career… Scored two goals vs. TBL (12/9), with one on the power play… Missed three games while in COVID protocol (1/15-1/22)… Scored a power-play goal in back-to-back games from 2/12-2/14, including the game- winning goal at SEA (2/14)… Tallied two points (1g, 1a) at DET (2/26), including his second career shorthanded goal, but suffered an upper-body injury and missed the next three games (2/28-3/5)… Posted his second three-game goal streak of the season from 3/13-3/17 (3g)… Suffered a concussion at NSH (3/19) and missed the final 27 games of the season (3/23-5/14).

Skated in the season opener with Carolina, logging 11:02 of ice time in his Hurricanes debut vs. CBJ (10/12)… Was placed in concussion protocol the following day and missed the rest of the season due to concussion symptoms.