Analyzing DeMar DeRozan's recent performance, I'm predicting the under for DeMar DeRozan Rebounds where the line is 4.5. 

DeMar DeRozan has been one of the most reliable and successful NBA players for the past several years, helping the Chicago Bulls to numerous wins and playoff appearances. Nevertheless, his performance has been on the decline as of late. 

When looking at his overall season averages, DeMar DeRozan is averaging 25.3 points, 6.6 assists, and 6.3 rebounds per game. At home, he's averaging 22.86 points, 6.2 assists and 6.2 rebounds in his career against the Raptors, while on the road he's averaging 28.19 points, 7 assists and 6.4 rebounds. This season, he has played in a total of 55 games with 29 of those games going over 4.5 rebounds. 

However, when looking at his recent performance, his numbers have been on a decreasing trajectory. Over the last 20 games, he's averaged 32.2 points, 8.8 assists and 6.9 rebounds and has had more than 4.5 points, assists and rebounds in 20 games. Over the last 10 games, he's averaged 29.7 points, 8.1 assists and 6.5 rebounds and has had more than 4.5 points, assists and rebounds in 10 games. Over the last 5 games, he's averaged 27.2 points, 7.8 assists and 6.2 rebounds and has had more than 4.5 points, assists and rebounds in 5 games. Evidently, DeMar DeRozan is declining in performance.

Furthermore, DeMar DeRozan has been even less successful when playing against the Toronto Raptors. In 12 games against the Raptors, he's averaged 22.3 points, 6.6 assists and 6.3 rebounds. 

Given DeMar DeRozan's recent downward trend in performance and his lack of success against the Toronto Raptors, I'm inclined to predict the under for DeMar DeRozan Points, Assists, and Rebounds where the line is 4.5. Even though DeMar DeRozan has been one of the most consistent and successful NBA players for the past several years, his recent performance does not give me the confidence that he will be able to reach the 4.5 points, assists, and rebounds mark in this game against the Raptors. Furthermore, his past performances against the Raptors make me even less confident that he will be able to reach the line. 

DeMar DeRozan may be one of the best players in the league, but if his recent trends are any indication, his performance in this game against the Toronto Raptors may be below average. As a result, I'm predicting the under for DeMar DeRozan Rebounds where the line is 4.5.