Morpho-syntactic patterns device encompasses a subcategory of the cohesive devices that assists hearers to have an adequate mental representation for understanding speech. This article investigates the morpho-syntactic patterns employed in some Persian live sport radio and TV programs adapting Dooley and Levinsohn’s theoretical and analytical framework. The research data includes around 30,000 words extracted from 20 live sport radio and TV recorded programs. The morpho-syntactic patterns functionality is presented via comparing their frequency using descriptive statistics. The t-test is run to evaluate whether the differences in the utilization of morpho-syntactic patterns used in live radio and TV talks is significant or not. The results show that such patterns in Persian can be studied in the same way as Dooley and Levinsohn’s perspective, among which consistency of inflectional categories receives the most frequency while echoic utterances do the least. The consistency of inflectional categories catches a meaningful difference between its applications in the research data. Furthermore, there are not significant differences between the application of echoic utterances and discourse-pragmatic structuring in the corpora. Finally, morpho-syntactic patterns device, generally speaking, is reported as not having any significant relation in its applications in Persian live radio and TV talks under study.